Whilst Ribombee isn't the bulkiest, it still has a couple of neat resistances. 4X fighting and 2X ground come to mind.
As mentioned before, a ground type partner would help. Ribombee can't do much to steel-types.
I do think it's worth mentioning that at 124 speed, Ribombee is the fastest Fairy-Type available in the meta game. Does it outspeed any notable scarf users?
Max speed Ribombee hits 381 Speed, which according to
this list is a single point slower than Adamant Scarf Diggersby and +1 Feraligatr.
Also Koko is a faster Fairy (
and Scarf Lele), but if we're talking UU the next fastest would be Whimsicott.
Speaking of its resistances...
252 Atk Life Orb Pheromosa High Jump Kick vs. 0 HP / 0 Def Ribombee: 108-127 (41.3 - 48.6%) -- guaranteed 3HKO
Obviously you're dead if it has poison jab and U-turn is always there, but Fun Fact.