1. Eric Stuart and Ted Lewis doing a horrible job with King Dedede and Meta Knight's voices
2. The two kids are unimaginatively named "Tiff" and "Tuff"
3. Nintendo breaking their promise to make the show "kid friendly"
4. Meta Knight not flying (I know about the pilot so don't tell me)
6. Almost everyone being voiced by a "squeaker" (that's a term for a teen/adult with a really high-pitched voice)
7. Dedede's awful line in the theme song
8. They couldn't get a real little boy to voice Tuff
9. It's an anime and I hate anime
10. It ran for only 1 season
11. Dedede's antagonistic behavior (I know about that one episode where Dedede was sad over "killing" Kirby so don't tell me about it)
12. They chose to permanently kill off a robotic puppy (animal abuse)
13. Meta Knight's backstory making no sense
14. Kawaski's voice actor sounds like he smoked 84 cigarettes a day
15. Dedede's ripoff of the theme song
16. That one episode insulting overweight people
17. It's just plain stupid