Cubix: Robots for Everyone Season 1 Episode 1

Solex makes Botanix hate green.

You can now watch this episode on 4Kids.TV in four parts - each separated by what was originally a commercial break:
Part 1 Part 2 Part 3 Part 4

We learn that Connor's mother died, and that he wanted a robot to help him to forget about the death of his mother.

Robot Battle: Cubix vs. Kolossal - Cubix and Connor fly in, Connor jumps off and kicks Kolossal in the head, and then tackles Dr. K. Cubix flies in attacks Kolossal, then turns into his normal self. Dr. K uses his stink bubbles to scare Connor away, then flies off and leaves it to Kolossal. Kolossal throws a wooden beam at Connor, which Cubix catches, and then throws it back at Kolossal. Cubix then flies in, grabs WeldNFix, and then leaves before the building collapses.

Infected robot: WeldNFix. (Botanix is also infected but that's not a major part of the episode)

Debuts: Connor, Chip, Abby, Mong, Graham, Hela, Cubix, Maximix, Cerebrix, Dondon, Disposix, Mixmutt, Acoustix, Brutix, Propellix, Raska (alien, her human form is only on a billboard), Dr. K, Kolossal, Mr. Fixit, Diagnostix, Detectix, Hop2ix, WeldNFix, Sgt. Civix, Ixmow, Botanix, Pestixide.

First aired on Fox Box: September 6, 2003.