Board Thread:General Discussion/@comment-30178351-20160405091519/@comment-5956954-20160405091804

The relation is merely speculation, not canonical, and therefore, is unconfirmed.

Gasterblasters or not, unless sans says it in the game, or it is heavily implied from other sources, it can't be added to articles that possess only factual and strongly supported info.

But hey, I don't know any better myself. only Toby can solve this.