>>38018030It gets a ton of buffs compared to Ledian, its supposed counterpart, and just a lot of stuff overall. Its movepool is filled with additions every other every gen, starting in gen 4. It is still a trash mon, but someone at Gamefreak clearly cares about it and pushes for stuff all the time.
Gen 3: The dark ages, basically forgotten
Gen 4: Sucker Punch and Toxic Spikes
Gen 5: Actual Bug STAB, Shadow Sneak, and Rage Powder
Gen 6: Sticky Web, Megahorn, and Fell Stinger
Gen 7: Swords Dance by level up, a signature fucking move in Toxic Thread, and a minor BST increase. Fell Stinger buffed.
You could argue most mons get moveset additions but usually that just comes with Gamefreak adding new moves. With Ariados they are adding previously unlearned stuff on top of almost exclusive stuff.