>>31700680You're probably not BPing to Thundurus with Chansey active. The problem comes if Chansey can switch in and kill Thundurus since all the speed and SpA boosts in the world don't matter if Seismic Toss kills you faster than Tbolt can kill her, even with the free NP on the switch. You're also relegating yourself to potential 50/50s if you DON'T want to waste a turn Taunting, and if they outpredict you and get Softboiled off, you've pretty much lost your BP recipient. Or, you could also miss with a Focus Blast and lose your BP recipient.
Xurkitree just doesn't have these issues. It's got significantly more power, it's consistent, and the Balloon set can punish opponents spamming Earthquake against your Scolipede (something they likely wouldn't do vs Thundy, and Manaphy is the Z-Crystal holder for the team so you can't opt for that).
Xurkitree hits harder, doesn't have to rely on Focus Blast or 50/50s, and if it gets a kill and snags the boost to +4 it's pretty much unstoppable at that point since that's a threshold where pretty much nothing can survive it anymore.
Thundurus probably outclasses Xurkitree in some LO attacker role, but nobody uses either of them for that. Xurk is solely a BP recipient, and any shortcomings it has compared to other electrics pretty much vanish when it has like +3 speed. This is why BP teams with Xurkitree are starting to flood the top of the ladder and why Xurk hasn't fallen yet. It's very good on one specific team type. This is kind of like Shedinja, there's exactly one team that abuses it pretty well (it actually has OU usage in 1825 stats because that team is popular with high level players), and the other things that usually outclass it simply are inferior on that specific type of team.
