Karin reads a note in one episode that's from Ikki's mother assuring him she's fine and everything but then as Karin reads on the note reveals the writer of this note is not Ikki's actual mother. For a moment, everyone is confused on just who Chidori really is if she's not Ikki's mother. But then Karin keeps reading and it's revealed it was Seaslug writing the letter the whole time, letting him know he's kidnapped her.
When Ikki and Metabee try to stop that giant robot from devastating the city (before the tournament)....
Metabee: Umm.... Ikki, now that we got on this thing, how do we stop it??
Ikki : Um, I have no idea. I didn't think of anything.
Metabee: You WHAT!!?? oh, that's just great Ikki. Real smooth.
Karin blowing up the security door at the tournament while Koji is standing there within the explosion. What's funnier is that the explosion is pretty silent.
For North American viewers, the first time you heard the trailers on TV probably may have given you a chuckle, because of Ikki's Unfortunate Name, making some people think "And the winner is... Icky!"