DEKU

DEKU is the rival of Baba in Twitch Plays Vietnamese Crystal. He stole a Totodile from Professor Wujisu and tends to show up where Team Missile Bomb show up.

He appears to have feelings for Baba, as he confesses his love for her and jealousy at her Pokémon.

Etymology
The Deku are a plant based species in The Legend of Zelda, another long running and popular Nintendo series.

He is likely named after DekuNukem, one of the three moderators of Twitch Plays Pokémon. He shares his name with a Togepi of the same name and a deleted character from Moemon.