Passive: Counterblow - each time you are targetted by a physical attack, you have a small chance to deal damage in retaliation. Damage and chance would scale with level.
Q: Kanga Kick - Like Lee sin's ult but it doesn't knock back as far and doesn't knock anyone up.
W: Joey Frenzy - Throw your child at a champion. It latches on for 4 seconds, covering their eyes and blinding them.
E: Leapfrog - Jump on an enemy or ally, slowing or speeding them up for 3 seconds and propelling yourself a good distance (about 700 range I'd think), damaging all enemies in the landing zone.
R: Boxy Boxy - Passively gain attack speed. Each attack on an individual target increases damage dealt by 10%, up to 5 times. Resets on attacking another enemy.
The W is gimmicky. I just ran out of ideas and thought of something strange.
The W is a bit too long for a blind. Maybe reduce it to 2 seconds, but it also does some damage over time? That's too much like teemo's blind dart though...
Maybe make it like a fear, but the joey is on your back, pulling you around in different directions. --- GENERATION 21: The first time you see this, copy it into your sig on any forum and add 1 to the generation. Social experiment.