Level 100 Statistics (see level 5, 50, 100)
Buizel can be one of the most devastating Pokémon in Little Cup for good reasons. With a positive Speed nature and maximum Speed EV investment, Buizel hits 19 Speed, easily outspeeding most of the metagame, as well as tying with many others. With the rain up, its Speed doubles, making it the fastest Pokemon at +2 in Little Cup. In addition, it can Baton Pass both Bulk Up and Agility, and its good defensive stats (factoring in defensive EVs and Bulk Up's Defense boost) and Speed allow it to perform this job pretty well.
However, one cannot say that Buizel is without faults, because it most certainly does face some problems. Though Buizel has good offensive and Baton Pass support potential, it usually has to pick between offense and bulk, leaving it deficient in at least one. Despite these downfalls, Buizel can certainly be a great addition to your team.
This is Buizel's primary sweeping set. With only a bit of support, this set can cut through unprepared teams like a hot knife through butter. As the set name implies, this set best works in the rain. Waterfall is Buizel's main means of attacking, with decent Base Power, STAB, and perfect accuracy. Aqua Jet allows Buizel to also function as a revenge killer outside of rain, picking off faster, weakened threats before they can attack. Return pairs well with the previous moves, as the combination of Water and Normal is unresisted in this metagame. Finally, what goes into the last moveslot boils down to what you want Buizel to hit harder. Bulk Up is the primary option, as Buizel appreciates the extra boost in power, but Ice Punch is a decent substitute because it hits Dragon-types such as Dratini and Bagon harder in the rain, even OHKOing the former. Outside of rain, Ice Punch hits Gligar harder than Waterfall, though it will only OHKO the defensive variants 50% of the time. Finally, Brick Break guarantees an OHKO on Carvanha, and outside the rain, does more damage to Pokémon weak to Fighting, such as Aron and Munchlax. A Life Orb is essential on this set, giving Buizel the extra power that it needs to sweep efficiently. The EVs maximize Buizel's Attack and Speed, and the remainder is used to give Buizel an extra point in Special Defense.
Team Options & Additional Comments >>>
The purpose of this set is to support the rest of the team with stat boosts. However, Buizel is capable of sweeping by itself after netting a couple of boosts. The first slot is what Buizel wants to pass - if the intended recipient needs Attack, then choose Bulk Up. If Speed is needed, then go with Agility. Baton Pass is absolutely essential for this set to work. In addition, Buizel can "dry pass" to scout for its switch-in. The third slot should complement Buizel's first move. If Bulk Up was chosen, then Aqua Jet is the desired move, allowing Buizel to strike first with a powerful blow. If Agility is being used, then Waterfall should be paired up with it, because Buizel appreciates the extra power. Return pairs well with either attacking move. Oran Berry gives Buizel extra longevity, which allows it to possibly get in a few more boosts before having to Baton Pass. The nature and Speed EVs allow Buizel to still tie other Pokémon in the 19 speed tier, while the remaining EVs maximize its ability to take hits.
Team Options & Additional Comments >>>
Buizel's options are pretty much limited to the sets listed. It can run a decent special or mixed set, but they both are inferior options when compared to a pure physical set. A physical Choice set may seem viable, but the power difference between Choice Band and Life Orb in Little Cup is pretty negligible. An Agility set, in tandem with Substitute and a Liechi Berry, might sound interesting in theory, but Buizel would be easily beaten by priority.
Checks and Counters
Although Buizel has a lot of offensive potential, it does have some hard counters. For one, Croagunk stops the first set cold, as long as it can avoid a predicted Return as it switches in. Phazers, albeit rare, can shut the Baton Pass set down if they can avoid being KOed by Aqua Jet and Return. Chinchou can beat any Buizel one-on-one, as it isn't even 2HKOed by Return (factoring in its Oran Berry). Snover is a great check to Buizel, as it can easily take a Waterfall or Aqua Jet, and only fears a predicted Brick Break. In addition, Snover's ability kicks up a hailstorm, which ends Buizel's sweep in the rain. Most bulky Grass-types, including Exeggcute, also fare well against any Buizel not carrying Ice Punch.