When you have a Terapagos or Terapagos-Terastal and check the Tera checkbox, Terapagos's forme will automatically be changed to Terapagos-Stellar, and its stats will get updated automatically. When you have a Terapagos-Stellar and you uncheck the Tera checkbox, Terapagos's forme will be changed to Terapagos-Terastal and its stats will get updated automatically. It will function similar to how Ogerpon's forme interacts with Terastallization.
thejetou
commented
3 months ago
When you have a Terapagos or Terapagos-Terastal and check the Tera checkbox, Terapagos's forme will automatically be changed to Terapagos-Stellar, and its stats will get updated automatically. When you have a Terapagos-Stellar and you uncheck the Tera checkbox, Terapagos's forme will be changed to Terapagos-Terastal and its stats will get updated automatically. It will function similar to how Ogerpon's forme interacts with Terastallization.
https://www.smogon.com/forums/threads/pok%C3%A9mon-showdown-damage-calculator.3593546/post-10060270