I play Battle Spot/Tree singles and occasionally wifi battles and I'm wondering.. Naganadel is a speed boosting Ultra Beast with no quad weakness and a STAB for fairy types, but Garchomp has a quad weakness, has a ground typing, and is a user of stealth rocks and swords dance. I already have Scizor to deal with fairy types and I don't need Swampert anymore.. Should I just add Garchomp and Naganadel on the same team or have one or another?
Naganadel is often better in both singles and doubles because it has better base speed, better moves, and a better ability. It's good at using fire blast and checking fairy Pokemon.