What type of bug are you reporting? Teambuilder
What is the bug?
When selecting a sample set on a pokémon that uses Hidden Power in gens 2-6, its IVs are lowered for the correct Hidden Power type. If afterwards a different sample set is selected on the same pokémon, its IVs will stay lowered for the aforementioned HP type even if the new set does not use Hidden Power, making the pokémon's stats suboptimal if the player doesn't notice it and manually fix it.
Are you able to replicate it? If so, how?
Create a team for gen 3 OU. Add Tyranitar, click on import/export and select the sample set "Fast Dragon Dance". Then, on that same Tyranitar, click on import/export and change to the "Pursuit" sample set. Tyranitar's attack, defense and special defense IVs will remain 30 despite the set no longer using HP bug.
What is the bug?
When selecting a sample set on a pokémon that uses Hidden Power in gens 2-6, its IVs are lowered for the correct Hidden Power type. If afterwards a different sample set is selected on the same pokémon, its IVs will stay lowered for the aforementioned HP type even if the new set does not use Hidden Power, making the pokémon's stats suboptimal if the player doesn't notice it and manually fix it.
Are you able to replicate it? If so, how?
Create a team for gen 3 OU. Add Tyranitar, click on import/export and select the sample set "Fast Dragon Dance". Then, on that same Tyranitar, click on import/export and change to the "Pursuit" sample set. Tyranitar's attack, defense and special defense IVs will remain 30 despite the set no longer using HP bug.