i feel like im missing some shorter and easier route to get the the final marble piece for the dildo quest.  because i have been unable to either fight my way through and back or just run past everything. even with full health the triple tiger fight takes out half of it on a good run so is there a secret shortcut? or am i just going to have to fight 7 tigers a few bombers and a couple bugs to get it.

You could always return to the save spot for a full heal. The pouncing contest is a one time event and won't respawn. Hope that helps! ^^