Grenade Part 2 - General Tips

Be careful to not drop a Mega Ball on top of the first ladder. Summon Rush Bike as soon as you are up top.

Be careful not to drop into the pit near the hammers on Rush Bike.

Land on the Red Bomb with Rush Bike to prevent the Joe from spawning (as long as you don't jump again)

While it is theoretically possible to Rush Bike Double Jump up the ladder and keep Rush Bike to the end of the stage, it is not RTA easy to do.