Board Thread:Questions and Answers/@comment-27327020-20160404174206/@comment-34198897-20180403133226

my opinion (there are only bosses or main characters (likely))

gaster - ??? his power cant be measured we havent any feat of his strenght he might be someone strong but we dont know. actually he seem to have no soul and that means he is weakest in undertale (or not?)

sans - yes he weakest monster alive, most lazy and have worst stats

alphys - hmmm its hard too say she is psychically weak but her inventions might be very powerfull

flowey - yes he is strong but he is just a flower i think papyrus can easily overhelming him with he's attacks but he is very smart and can kill stronger character with suprise

papyrus - sans brother very innocent but not strong at all. frisk can easily beat him but we dont know is it his full power

muffet - she is very strong and durable with shes spiders but i think undyne with her determination can beat her

undyne - now there is hero easily can  lift rocks have very big stamina can run from waterfall to snowdin in seconds have very strong defence what is nearly impossible to kill with frisk at 1lvl and her determination cant keep her alive

mettaton ex - she is very strong i think stronger than undyne with his metal body and its hard to beat him.

toriel - boss monster have very powerfull soul and one shot flowey, in battle with frisk he doesnt even want to hurt frisk and struck player with her weak attack. she can knockback asgore and likely fight him

asgore - king of monsters very strong, flowey said he doesnt have chance with him in flowey form , he is very durable and strong can beat frisk many times even with end armor and weapon

mettaton neo - she is strong but its hard to say. he just die after one hit i think she cant beat undyne the undying but she seems to be extremaly powerfull and be superior to ex form

frisk (determination) - super durable, strong , fast human who have weapons and armors , her determination can return time to last reset , he can with this power know next move of his enemy.

Undyne The Undying - the last hero, first enemy what doesnt die after lvl frisk attack when others doesnt have any chance she is one of the strongest monster and even frisk have very big problems with kill her and dies very often. as everyone know she is superior too her normal form who died in one attack

sans(when he was someone extremaly evil) - he's power are super strong, cant teleport , use telekines and easily destroys player dozens of times, he know he is in the game , know mechanics but even he after dozens of resets cant beat player and get killed

frisk (player, genocide) - after player start take over control he gain big amount of lvl easily kills toriel who was boss monster and other monsters even undyne , but then undyne switch into undying form and player have many trouble with she but kill her after that after hard battle kill sans too and at the end kill flowey and asgore efforthessly

Chara - multiverse being who one shot can destroy timeline, player gets shot one time and died instantly she can load save and stay alive even when world become destroyed

OMEGA FLOWEY - his power are incredible strong, have power to control resets and saves and do it even greater than player , easily can destroy frisk in second but he plays with her. frisk must gain help from souls to have any chance but even then omega flowey easily kill her thousands of times. eventually souls blow up and beat him

Asriel Dreemur - he is superior to omega flowey and have power to became so strong even frisk with determination of her friends and every monster cant struggle. in my opinion he can destroy frisk in any moment but he doesnt wants it. he have power of every monster - undyne, sans , asgore and more he have power off souls too he in normal form easily destroy timeline with hyper goner and become even powerull in his true power