Tera Type Optimizer
Choose a Pokémon to compare its defensive matchups (weaknesses, resistances, immunities) and offensive coverage for every Tera type, ranked to cut the most weaknesses. Based on the Gen 9 type chart.
Swinub
IceGround“Best defense” scores each type as resistances + immunities×2 − weaknesses×2. In practice, also weigh ability, item and moves.
FAQ
How are the Tera types ranked?
After Terastallizing, the Pokémon becomes that single type. Each candidate is scored as resistances + immunities×2 − weaknesses×2, so types that remove weaknesses while adding resistances rank highest.
How do I read offensive Tera types?
Switch to “Offensive coverage” to rank types by how many defending types their moves hit super-effectively. A Tera type matching one of the Pokémon's original types keeps STAB.
Which generation does it use?
Terastallization is a Gen 9 (Scarlet & Violet) mechanic, and matchups follow the Gen 9 type chart.