The main reason I love Jungle Japes is that it takes away Olimar's two biggest weaknesses.
1. We don't get gimped. As long as the Olimar is smart, and stays away from the left side, the water saves us. Sacrificing our pikmin to live is more than worth it. It takes 9 frames to pluck a new pikmin, and we only need one. Waiting a bit to pluck more is fine.
2. Pressuring us to a ledge will not happen. You're actually wrong in saying that we don't have more room to grab. In fact, we have added room. On a normal stage, if Olimar pivot grabs and is left against a ledge, he's, well, ****ed. Olimar is terrible close up against an opponent. Kirby is definitely one of the characters that, against Olimar, can pressure him extremely well close up. If Olimar is cornered between a ledge and an opponent, gg. On Japes, however, say we run into the right ledge. We're backed against kirby and the end of the stage. Wait. There's another ledge, hell, a small stage behind us that we can retreat to lol. Say you follow us to the right stage. Well, while you're coming to us, the ledge is actually safe for us, rather than on another stage where we have to actually get off of it lol. On other stages, we have one option, getting off of a ledge, coming towards the opponent. This can obviously be mixed up with an attack, whistle, air dodge, etc, but at the end of the day, we have to cross our opponent, and run past them. On japes? We can drop from the ledge and we actually have three extra options. Attacking from under the ledge is viable, if you're on the stage. We can retreat under the stage, grabbing one of the other two ledges available. Or hell, even jump in the water and start from scratch, appearing on the other side of Japes.