The puff up glitch is in SSBB when you use Jigglypuff's final smash in the bridge of Eldin.There is also a glitch in the game where the terrain in some stages (mainly Bridge of Eldin) touches Jigglypuff and knocks it out of the move, yet it remains the same size it was when it was forced out of the Final Smash. If Yoshi (or Kirby with Yoshi's ability) uses his Egg lay on Jigglypuff after this, or Jigglypuff picks up a Super Mushroom, its size doubles, allowing Jigglypuff to become the biggest character in the game. Its size resets when it uses the Final Smash again or gets knocked out. A side effect to the puffing is when you get hit by the bridge and recover, you'll most likely die.
- Jigglypuff must break a Smash Ball.
- On the Bridge of Eldin, after King bulbin destroys the middle of the bridge, a twilight portal will open after a while and start restoring the bridge. Any time during the restoration of the bridge, jump into the space where the Bridge will re-appear with Jigglypuff and use its Final Smash.
- Jigglypuff will start to grow, during which the bridge will be fixed, and if timed correctly, Jigglypuff will be launched into the air and will stay in its larger state. It now has a larger attack range, but the damage from its attacks will remain the same.
- If Yoshi (or Kirby with Yoshi's ability) uses Egg lay on Jigglypuff while it is in its permanently enlarged state, it will escape the egg and become twice the size it was before.