Aside from the 1.2x boost, Ogerpon's biggest feature is its signature move, Ivy Cudgel. Because of the mask, Ivy Cudgel becomes a 120bp, non contact move with 100% accuracy and increased Crit ratio. It is super spammable and doesn't have to worry about Static/Rocky Helmet etc
Ogerpon is also blessed with good coverage. Play Rough for dragons who resist it's STAB, knock off for Glowking and general utility, Power Whip for wallbreaking, Trailblaze for speed boost, Horn Leech for recovery, and U-turn for pivot. it also has support moves like leech Seed, spiky shield, Taunt, Encore and Synthesis.
While the fire Ogerpon is the most explicitly threatening form, the water and rock versions are also pretty decent, especially if you decide to opt for a more supportive role. Water form's water immunity allows it to prevent flip turn spam, and well as immunity to scald, aside from being a dangerous wallbreaker in rain. Rock form's Sturdy can be situationally useful, aside from special defense boost in sand. And of course, Fire form's Mold Breaker allows it to break past Unaware users and Multiscale Dragonite, while being a nuke in Sun (and a great partner to waking Wake). The base form only has mono STAB and no 1.2x boost, nut it can also hold item.
Contrary to what some may think, Ogerpon isn't actually a tera hog. Its base ability is in fact, preferable most of the time since those provide decent niche, especially Mold Breaker for fire version. However, tera Ogerpon does provide decent surprise to unexpecting opponents.
Despite the drawbacks, I believe all versions of Ogerpon will usable in OU, with the fire version potentially too much for the tier. It will be interesting to see its development as the meta progresses
