I kinda like the theme your going for, King of the Jungle type of character.
Gronggo, Lord of the Jungle?
Passive: Bananas - Bushes around Gronggo will cause Bananas to appear. Eating a Banana will make Gronggo Power Hungry.
Power Hungry - Gronggo gain bonuses after consuming a Banana.Healing him for % of health, increasing his movement speed and attack speed, but adding 6 points to his Gluttony bar.
Secondary Bar: Gluttony - When Gronggo consumes 30 points of Bananas(5 bananas) he becomes Bloated. When bloated, Gronggo has decreased movement speed and attack speed and is silenced, but will start regenerating hit points until his Gluttony bar reaches Zero points. Gluttony points only decay or reset after death.
Gronggo smash(Q): Gronggo Smashes the ground, making a small crater (mini jarvan ult), enemies hit take damage and are trapped inside for 3 secs.
Intimidating Presence(W): Gronggo presence sends chills down those weaker than him, making them Intimidated lowering their attack damage.
Passive: Gronggo receives reduced attack damage from Intimidated enemies.
Active: lets out a powerful roar that stuns Intimidated enemies for 2 seconds, enemies that are not intimidated are slowed instead.
Mud Throw(E): Gronggo throws "Mud" at the target, dealing damage, lowering their vision and movement speed for 5 secs (skillshot)
Spin and Throw: Gronggo grabs hold of an enemy champion, spinning them dealing damage to them and those around him for 3 secs. When the effect ends, the target will thrown in a target location be dealing damage to enemies hit, stunning them and the target.
Just some ideas ;)
Keep it up, Stay strong, Good luck
