The Royal Guards are a mini-boss duo the protagonist encounters in the upper levels of Hotland. Shown by their names, they are members of the Royal Guard. Royal Guard 01 experiences romantic attraction towards Royal Guard 02, as portrayed in the dialogues during the battle.
- The guards fight together using "Team Attacks" from the bottom and top of the screen. These attacks consist of:
- Projectiles that drop from top of the screen in a similar fashion to Vegetoid's attack.
- Star-like bullets that move vertically from the bottom and top of the screen.
- If one guard is defeated, the other's attacks double in intensity and become much harder to dodge.
- If 02 takes off his armor, the attacks from the top of the screen become erratic and fall out the side of the bullet board.
- To spare this duo, one must clean Royal Guard 02's armor, and interact with the Green projectile five times.
- At this point, 01's attacks become shaky and easy to dodge.
- Once 02's armor comes off, whisper to 01 to be honest about his feelings.
- Note that even after meeting spare conditions, they continue attacking the protagonist's SOUL as usual if any action is used.
- Hey! You! Stop!
- We've, like, recieved an anonymous tip about a human wearing a striped shirt.
- They told us they were wandering around Hotland right now... I know, sounds scary, huh?
- Well, just stay chill. We'll bring you someplace safe, OK?
- ... Huh? What is it, bro?
- The shirt they're wearing?
- ... like, what about it?
- Are you thinkin... What I'm thinkin?
- Bummer. This is, like... Mega embarrassing.
- We, like, actually totally have to kill you and stuff.
- ... you're here.
- So that means Undyne...
- Like, Undyne!
- We'll avenge you!
- Like, team attack! [Encounter]
- Like, perish and stuff. [Neutral]
- Like, you're dead and all that. [Neutral]
- Like, what? ...I don't get it. [Whisper to RG 01 before successfully cleaning RG 02's armor]
- Like, hands off the merch. [Clean Armor to RG 01]
- D... Dude... [Neutral after Clean Armor to RG 02]
- H-HEY! STOP THAT! [Clean Armor to RG 02 #2]
- 02... I never told him... [if RG 02 is killed before the 'spare' option is available]
- 02!? B-but why!? [if RG 02 is killed after the 'spare' option is available]
- ... [Neutral after RG 02 killed]
- 02... this is, like, for you. [Neutral after RG 02 killed]
- Like, 02... [Neutral after RG 02 killed]
- 02... are you really.. [Neutral after RG 02 killed]
- ...team attack. [Encounter]
- ...sigh. [Neutral]
- ...what? [Neutral]
- ...i won't tell. [Whisper to RG 02]
- ......heh. [Clean Armor to RG 01]
- ...getting...warmer. [Clean Armor to RG 02]
- 01...you...!..!!!! [if RG 01 is killed before the 'spare' option is available]
- 01...?! What the...!? [if RG 01 is killed after the 'spare' option is available]
- ... [Neutral after RG 01 killed]
- [RG 02] ...can't...take it. | ...armor...too...HOT!!! | ...much better. [Clean Armor to RG 02, successful]
- [RG 01] I... I... | D-dude... | I can't... | I can't take this anymore! | Not like this!! | Like, 02! I like... | I like, LIKE you, bro!! | The way you fight... The way you talk... | I love doing team attacks with you. | I love standing here with you, bouncing and waving our weapons in sync... | 02... I, like, want to stay like this forever... [Whisper to RG 01 after Clean Armor to RG 02]
- [RG 02] ... | ....
- [RG 01] Uh... | I mean, uh...
- Psyche! Gotcha bro!!! Haha! [If the protagonist didn't call Undyne before encountering the guards]
- Whew, bro! That human, | Put me, uh, under mind control! | What was I just saying? | It's a blur dude!! Whoops! [If the protagonist called Undyne before encountering the guards]
- [RG 02] ...01.
- [RG 01] Y-Yeah, bro??
- [RG 02] ... | ...do you want to... | ...get some ice cream... | ...after this?
- [RG 01] Sure dude! Haha!
- Royal Guard attacks! [Encounter]
- Royal guard member with shining, polished armor. [Check RG 01]
- Royal guard member with stuffy armor. [Check RG 02]
- 01 is polishing his face. [Neutral]
- 01 stands guard. [Neutral]
- Sweat pours from 02's armor. [Neutral]
- 02 watches your movements. [Neutral]
- Anguished noises come from inside 01's armor. [Neutral after killing RG 02]
- 01 holds his head in his hands. [Neutral after killing RG 02]
- 01 doesn't know what to do. [Neutral after killing RG 02]
- 01 stands still. [Neutral after killing RG 02]
- 02 is clenching and unclenching his fists. [Neutral after killing RG 01]
- 02 is shaking his head. [Neutral after killing RG 01]
- 02 is striking his sword against the ground. [Neutral after killing RG 01]
- 02 is coughing. [Neutral after killing RG 01]
- You tell RG 01 to be honest with his feelings. [Whisper to RG 01]
- You tell RG 02 your favorite secret. [Whisper to RG 02]
- You attempt to touch RG 01's armor. Your hands slip off. [Clean Armor to RG 01]
- You clean RG 02's armor. Its cooling dirt begins to wash away. [Clean Armor to RG 02]
- 01 looks bothered by something. [Neutral after Clean Armor to RG 02]
- You pat RG 02's chest like a muscular bongo. [Clean Armor at RG 02 x2]
- You were repelled. [Clean Armor at RG 02 after RG 01 killed]
- 01 and 02 are looking at each other happily. [Spareable]
- I see two lovers staring over the edge of the cauldron of hell. | Do they both wish for death? | That means their love will end in hell. | I couldn't stop laughing. [Check during Genocide Route]
- After sparing them, the newfound couple can then be found at the top of Hotland, just before the MTT Resort, having bought all of the Nice Cream from the Nice Cream Man. The protagonist is unable to purchase Nice Cream from the vendor.
- A call from Undyne informs the protagonist of their species - RG 01 a bunny, and RG 02 a dragon, and that RG 01 requested to patrol with RG 02.
- Their in-game sprites also prove that (spr_royalguard_rabbit_d_0 and spr_royalguard_dragon_d_0)
- If the protagonist calls Undyne and Papyrus in the first room they see the Guards in, she goes on to talk about how she believes humans have mind control powers due to an anime that Alphys showed her, and ordered the Guards not to listen to her if she ever defended a human. Later, in battle, after 01 confesses his feelings to 02; instead of saying he was just joking, he blames his confession on human mind control.
- Their sprites are named with the word "bara," which is a misnomer of a Japanese genre of artwork and fictional media that features homosexual men and traditional masculinity made by men for men, known in Japanese circles as "gay manga."
- There are two unused sprites for two more Guards, RG 03 and RG 04. 03 appears to be a bug-like monster similar to a praying mantis and 04 appears to be a feline monster. They have a similar sparing mechanic, being two women who used to be friends but had a falling out.
- The Royal Guards are the only monsters not to have an explicit description of their circumstances in the ending credits sequence. The description is simply "Use Your Imagination," and is up to the players to decide.
- RG 01 and RG 02 are the only sprites in the game that have bouncing animations when talked to.
- Their Genocide Run check is a direct quote from Banana Yoshio's 1988 Japanese novel "Kitchen."
- If the protagonist kills 02 while he has his chest visible, he will appear to have his armor back on for a split second before he turns to dust.