GlitchDex/RB:221
7PkMn 'v (TENTACRUEL HYBRID) Dec: 221 Hex: DD Stats Lv.5: Atk 12, Def 12, Spd 16, Spc 18, HP 24 Stats Lv.100: Atk 147, Def 149, Spd 225, Spc 275, HP 296 Stats Lv.255: Atk 367, Def 372, Spd 566, Spc 693, HP 739 Attacks: Acid, Supersonic, Wrap, TM06 (Lv.1), Wing Attack (Lv.8), Doubleslap (Lv.11), CoolTrainer♀-type move (Lv.12), CoolTrainer♀-type move (Lv.13), TM20 (Lv.14), Hi Jump Kick (Lv.31), Petal Dance (Lv.62), Poisonpowder (Lv.69), Razor Leaf (Lv.79), Dragon Rage (Lv.95), Withdraw (Lv.99), TM04 (Lv.102), CoolTrainer♀-type move (Lv.115), CoolTrainer♀-type move (Lv.131), CoolTrainer♀-type move (Lv.137), Super Glitch BB (Lv.153), Super Glitch BB (Lv.159), Screech (Lv.187), Petal Dance (Lv.195), Withdraw (Lv.204), Explosion (Lv.220), TM17 (Lv.221), TM21 (Lv.230), Mimic (Lv.237), Type: Water/Poison Evolution? None
Obtain: Time Capsule exploit (Bellossom), CoolTrainer♀ move corruption or LOL glitch (0xDD sub-tile), Storage box remaining HP glitch with a remaining HP of 221, international fossil conversion glitch with an Attack stat of 221. Arbitrary code execution. Equivalent trade of Y:221 from a Yellow Version cartridge.
Front-sprite: 
Becomes 4, ゥァ (0xDD) in Yellow.
TM/HM moves
TM03 Swords Dance, TM06 Toxic, TM09 Take Down, TM10 Double-Edge, TM11 BubbleBeam, TM12 Water Gun, TM13 Ice Beam, TM14 Blizzard, TM15 Hyper Beam, TM20 Rage, TM21 Mega Drain, TM31 Mimic, TM32 Double Team, TM33 Reflect, TM34 Bide, TM40 Skull Bash, TM44 Substitute, HM01 Cut, HM03 Surf
Time Capsule exploit moves
Time Capsule exploit level-up moves:
Absorb, Stun Spore, Petal Dance, SolarBeam
Time Capsule exploit TM/HM:
Toxic, Hyper Beam, SolarBeam, Double Team, Rest, Cut, Flash
Time Capsule exploit prior evolution:
PoisonPowder (Oddish, Gloom), Sleep Powder (Oddish, Gloom), Acid (Oddish, Gloom), Leech Seed (Oddish (event))
Time Capsule breeding:
Flail, Razor Leaf, Swords Dance, Synthesis