Loser

Loser is a contestant in Battle for BFDI that first appeared in Getting Teardrop to Talk. Unlike most objects, he isn't named based on his appearance, a beige cube. Ironically, he is extremely popular despite his name. In fact, his team, The Losers!, was named after him. Everyone respects him, and he respects them back.

Trivia
Loser could probably be one of the loser cubes from episode 14 of BFDI.