Parody or...
...Great imitation of the humor and animation, it just needs your personal spin on the characters to a greater degree. They can look similar to the originals, but should look a lot wackier, so that just by looking at them, people know it's a parody and don't dismiss this as a copy-cat.
Making characters that are true mockeries of the originals and either perfecting your voice acting/having someone help with that might make this a real hit.