Can you help me remember the names of these cartoons?

This was about a robot kid, and he had a crush on a girl with braces if I remember correctly. And I distinctly remember one episode where he was solving a Rubick's cube very quickly, and some bullies swapped the stickers so he couldn't solve it.

The bullies were the main antagonists.

The robot kid went to school, if that helps.

The other one is about this kid that, in my memory, reminds me of Sherman (Rocky and Bullwinkle). The kid was in the future with a clean-freak robot and a big buff idiot. They did time travelling and stuff, and I remember that once they met the lady from the Mona Lisa (she had bad teeth) and George Washington Carver (he made peanut glue instead of peanut butter) to help them not screw everything up for the future.

They were both on Cartoon Network, and I'd really appreciate it if you could help me!

If you need any more details, just email me at ilovejohnnydepp1492@yahoo.com.

I know that the descriptions are kinda vague and rambly.