I got a hacked savegame with just about every item in the inventory and saw these really cool bombs. They were called Jump Barrel Bombs (or was it just Jump Bombs). Kind of like big powerful bounce bombs. They'd rotate and then fly into the air. Pretty cool but I have yet to see them mentioned in any combination lists. Can they be made and how do I get more of them?

Actually u can just buy it at the old merchant randomly but if u wanted the combination then its Small Barrel Bomb and Vespoid Wing. If you wanted the bounce bomb+, im not sure if its bomb arrowana or burst arrowana that u should combine it with.

EDIT:
Wait thats jump not bounce, sorry. I also saw that on my cwcheat. i dont think its a real item or its just a hack but anyway try finding in the combo reference if there's an unknown item with barrel bomb or barrel lid as one of the ingridient of it

you can get jump bombs by trading tickets obtained from JUMP quests, such as JUMP Teo, to the veggie elder.

Jump Barrel Bombs Are The Ones With The Pirate Symbol on Each Side And Travel Along An Arc Like Path (They Look Good With The Jolly Roger Armor)

And Theres Another One Too: Polytan Bomb Its Exactly Like A Lightning Rod Except In Bomb Format And It Detonates Normally Like A Normal Large Barrel Bomb And It Has Polytans's Face On It Imprinted