new champion

My brother had an idea for a new champion, but he is 9 so i changed it so it maybe can work. He want a champion with a lot of movement speed. But this champion don't have a lot of damage or AP or a great defense. This champion looks like a little boy with robot arms.

Abilities.

Passive: when he uses a auto attacks for 5 sec, a part of his movement speed turns into attack speed. That is the other way around when he didn't attack for 5 sec, but when he uses a ablitie he get slowed. Because he don't have a lot of power, so he gets tired.

Q: He trows his arms into the targets location hit him and pulls himself to the enemie. The enemies is stun. When he use this abilitie against a big wall he pulls himself to the wall. He can go through small walls.

W: He trows his robot arms in a wave to the targets location and hit the enemies on the way. when the arms are on max range and there is an enemie champion/minion/monster he graps it and lift it to then smak it against the ground. the enemies around the inpact they get slowed. The target is stun. When the arms hit a wall or tower all enemies are slowed but when an enemie is behind the wall/tower he gets stun.

E: He put his hands againt the ground and lift himself into the air, now he can walk over walls. But when a enemie use a abilitie on the place of his hands, he fall to the ground and tahe damage. When he use this abilitie and then his W, he wil smak his arms directly into the ground.

R: His arms will be become bigger and then his other ablities are stronger. When he use his ult and then Q, he and the target drawn towards each other.

R+w: He deal more damage and the enemies around the inpact are now also stun. R+E: Where he puts his hand to walk enemies are slowed and they take a bit damage.