Bart Simpson concept
Stars at beginning: 
Role: Damage
Position: Back
Team: Yellow
Entrance: Bart walks into battle. After rank green: look green skill
Victory: Bart performs skateboard trick.
Defeat: Dazed Bart falls into the ground.
Quote: ‘‘Ay Caramba!’’
Basic attack: Bart shots a rock using a slingshot to closest enemy
White skill: Firework display 
(fantastic damage)
Bart puts on fire box filled with fireworks and then kicks the box to enemies, causing an explosion, dealing X damage to all enemies, blinding them for 10 seconds and stunning for 5 seconds.
Enemies damaged by this skill which were already stunned receive additional X true damage.
Stun have a chance to fail against enemies above level X.
Green skill: A boy on a skateboard 
(true damage)
At the beginning of each wave, Bart ride on his skateboard across the battlefield dealing X damage to each enemy, knocking them back and reducing 50 tenacity for 10 seconds.
After that, when Bart lands on the correct place he performs skateboard trick and kicks his skateboard in mid-air to the closest enemy, dealing X damage and stunning the target for 15 seconds.
Bart is untargetable on skateboard.
Tenacity debuff have a chance to fail against enemies above level X.
Blue skill: Stink situation (fantastic damage)
Instead of a rock, Bart shots stink bomb to enemies, dealing X damage to enemies in the area and additional X damage over 7 seconds, blinding them for 12 seconds and removing up to 3 buffs from each infected enemy.
Purple skill: All pranked
Each time Bart uses one of his skills his skill power increase by X.
Each time an enemy is KO’ed Bart’s attack and movement speed increase by 50%.
Red skill: El Barto’s signature
Tenacity reduction from skill [A boy on a skateboard] lasts for entire battle and can’t be removed by any source.
Buffs on Bart lasts for 3 seconds longer and can’t be removed by any source.
Bart’s immunity against buff removing and enemies removing tenacity debuff on them have a chance to fail against enemies above level X.
Additional stat boosts:
+X skill power to [All pranked]
+X BD
+X HP
Friends
Huey, Dewey, & Louie - Prank the City
Disk
Longer and more dreadful disables
- +X HP
- +X SP to Bart and allies
- Bart’s disables lasts for 30% longer (+30% per star)
- While an enemy is disabled it loses 0.5% HP every one second (+0.5% bigger HP lose per star)
Dash - Creeps in the School
Disk
Bigger teams’ crit chance after [Firework display]
- +X BD to Bart and allies
- +X armor
- +100 starting energy (+100 per star)
- +5% conservation (+5% per star)
- Every time Bart uses [Firework display] Bart and each of his allies gains +2 normal and fantastic crit (+2 per star)