In Super Paper Mario, their paper counterparts are forced into marriage by the main villain Count Bleck.
Bowser's defining traits are his monstrous appearance with dragon-like elements, full-throated roar, fire-breathing abilities, cruel personality, bestial reptilian voice, never-ending conflict with Mario, and unrequited crush for Peach.
This is due to them both being female characters featured in the Super Smash Bros series and some promotional work for Nintendo.
They meet up in Odyssey, but the love is clearly not there anymore.
Koopa Canon Main article: Mario and Peach are childhood friends who are implied to have romantic feelings towards each other.
Would you mind calling around to some of my friends and tell them I will need their aid? She even wears them to sleep just in case someone walks into her room.