Attacky Sack is a large, monstrous bouncing ball enemy in Yoshi's Story. It possesses a pair of eyes and a set of sharp, pointed teeth. There are only seven Attacky Sacks, all of whom are encountered in the Magma Castle, where their attack is to try and bounce onto Yoshi. Attacky Sacks cannot be defeated.
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| Characters | Protagonists | Yoshi • Yoshis |
| Antagonists | Baby Bowser | |
| Supporting characters | Balloon Bully • Dragon • Ghost Rider • Huffin' Puffin • Miss Warp • Neuron • Poochy • Power Bee • Snake | |
| Levels | P. 1-Beginning | Treasure Hunt • Surprise!! • Rail Lift • Tower Climb |
| P. 2-Cavern | Bone Dragon Pit • Blargg's Boiler • Jelly Pipe • Torrential Maze | |
| P. 3-Summit | Cloud Cruising • The Tall Tower • Poochy & Nippy • Frustration | |
| P. 4-Jungle | Jungle Hut • Jungle Puddle • Piranha Grove • Neuron Jungle | |
| P. 5-Ocean | Lots O'Jelly Fish • Lots O'Fish • Shy Guy Limbo • Shy Guy's Ship | |
| P. 6-Finale | Mecha Castle • Lift Castle • Ghost Castle • Magma Castle | |
| Other | Practice (training level) | |
| Bosses | Bosses | Cloud N. Candy • Inviso • Cloudjin • Don Bongo • Baby Bowser • Ghost |
| Mini-bosses | Bone Dragon • Slug | |
| Enemies and objects | Enemies | Air Bag • Attacky Sack • Bamboo dancer • Bee • Big & Little Boo • Black Shy Guy • Blargg • Blindfold Boo • Blue Blurp • Bob-omb • Bone Dragon • Boo • Boo Block • Bullet Bill • Bumblebee • Bumpty • Burner Shy Guy • Centipede • Cheep Cheep • Chomp • Clam • ComBat • Do-Drop • Flying Shy Guy (propeller) • Frog • Fuzzy Wiggler • Gabon • Goonie • Ick Worm • Jellyfish • Jelly Ghost • Lakitu • Lava Ghost • Little Boo • Mr. Eel • Nipper Plant • Nipper Spore • Pak E. Derm • Peeper • Piranha Plant • Piranha Pest • Piranha Sprout • Puffer • Raven • Red Blurp • Sea Anemone • Sea cactus • Sensuikan Heihō • Shy Guy • Shy Guy Galleon • Shy Guy on Stilts • Shy Guy on Pogo Sticks • Snorkel Snake • Snow Guy • Spider • Spike • Spiked Fun Guy • Spiny Fish • Tehee Butterfly • Toady • Vine Slime |
| Objects | Bocci Ball • Bumper Ball • Burner • Direction Switch • Grinder • Jelly • Piston • Rail Lift • Spike • Spiked stone • Sword | |
| Items | Items | ? Bubble • Bumber 'Chute • Delay Switch • Heart Coin • Message Block • Mystery Crate • Power Flower • Special Heart • Super Happy Tree • Surprise Ball • Tulip • Warp Vase • Yoshi's egg |
| Fruits | Apple • Banana • Bomb Berry • Favorite Fruit • Grapes • Heart Fruit • Lucky Fruit • Melon • Pepper • Watermelon | |
| Miscellaneous | Moves | Crouch • Egg Throw • Flutter Jump • Ground Pound • Jump • Sniff • Swallow |
| Terminology | ♥ • Arrow Sign • Fruit Frame | |
| Other | Gallery | |