Which of these characters is NOT a boss in Crash Bash?

Ripper Roo is not a boss in Crash Bash. While he is a notable antagonist in the Crash Bandicoot series, known for his manic behavior and explosive attacks, he does not appear as a boss character specifically in Crash Bash. Instead, the bosses in this game include characters like Rilla Roo, Komodo Brothers, Tiny Tiger, Dingodile, and other recognizable foes.