Alright, let’s start with Wigglytuff’s stats, movepool, and typing in RBY.
RBY:
Typing: Normal (Weak to Fighting, Immune to Ghost, resisted by Rock because Steel doesn’t exist yet)
Movepool: Level-up movepool is terrible (only counting Wigglytuff not Jigglypuff, which does make some use out of body slam and double-edge) , but most TMs are available for its use, which are actually quite diverse? (Psychic moves such as Psychic and Psywave help against its fighting weakness).
Stats:
- 140 HP (monstrous)
- 70 Atk (subpar)
- 45 Def (fragile as my ego)
- 50 Special (In RBY, this is SpA and SpD as one stat, but not 25 in each stat)
- 45 Spe (Slow as a brick)
Basically, a HP tank but with these subpar defenses it won’t be doing you any favors.
LGPE:
Typing: Normal-Fairy (Immune to Ghost & Dragon, weak to steel and poison (fairy has a fighting resistance, cancels out), STAB is resisted by rock, steel, poison and fire, resists bug and dark.
Movepool: Again, terrible outside Jigglypuff and TMs (beautifully diverse, like a rainbow!). Dazzling Gleam and Hyper Beam (please don’t hate me) round out some nice STABs, and coverage on all types through its TM usage.
Stats:
- 140 HP (monstrous)
- 70 Atk (subpar)
- 45 Def (greater than power-tricked shuckle at least)
- 85 SpA (okay, but not pretty good as the other attacking option is base 70)
- 50 SpD (unexpectedly bad)
- 45 Spe (slow as a brick that needs to keep cementing itself)
Okay, kind of a special attacker now with extreme HP and terrible defenses? What kind of thing is this (admittedly better than RBY)?
Summary: From RBY this thing was destined to be an HP wall and nothing more. No defenses, subpar attacks, bad typing, but a great movepool? Wasted potential. Gen 6 gave this, shudders thing a nice typing buff, and paired with Fairy STAB made it somewhat usable in-game (not me though, only the finest Xerneas :)). LGPE didn’t really do much on its own, so my answer is that Wigglytuff had a great buff after Gen 6 (not really LGPE but still applies), but with its subpar overall stats it stays a mediocre-bad Pokemon. Glad I helped, took me quite a while to type on a phone.