What type of bug are you reporting? Unsure
What is the bug?
Ursaluna-Bloodmoon is buggy in /ms commands, and it seems like the teambuilder is using /ms to check if a pokemon should be shown when you search pokemon with a move, so this bug also affects the teambuilder.
When you do "/ms Ursaluna-Bloodmoon, all", Bulk Up is shown to be in the movepool of Ursaluna-Bloodmoon. In reality, this should be impossible.
When I do further research, I realized even the /ds and /learn commands are also bugged on Ursaluna-Bloodmoon. For example, if I do "/ds counter, all" only regular Ursaluna is shown. This is contrary to behavior on Tauros-Paldea, which all three forms of Tauros-Paldea are shown to learn Counter. If I do "/learn Ursaluna-Bloodmoon, Bulk Up", the reason provided that it does not learn Bulk Up is "Ursaluna-Bloodmoon's move Bulk Up can't be transferred from Gen 7 to 9.". However, Ursaluna-Bloodmoon does not exist in Gen 7.
Are you able to replicate it? If so, how?
Just try out the commands I stated above. Btw you can also verify it by searching for pokemon with "Bulk Up" in your teambuilder in PS. Ursaluna-Bloodmoon will show up.
What is the bug?
Ursaluna-Bloodmoon is buggy in /ms commands, and it seems like the teambuilder is using /ms to check if a pokemon should be shown when you search pokemon with a move, so this bug also affects the teambuilder.
When you do "/ms Ursaluna-Bloodmoon, all", Bulk Up is shown to be in the movepool of Ursaluna-Bloodmoon. In reality, this should be impossible.
When I do further research, I realized even the /ds and /learn commands are also bugged on Ursaluna-Bloodmoon. For example, if I do "/ds counter, all" only regular Ursaluna is shown. This is contrary to behavior on Tauros-Paldea, which all three forms of Tauros-Paldea are shown to learn Counter. If I do "/learn Ursaluna-Bloodmoon, Bulk Up", the reason provided that it does not learn Bulk Up is "Ursaluna-Bloodmoon's move Bulk Up can't be transferred from Gen 7 to 9.". However, Ursaluna-Bloodmoon does not exist in Gen 7.
Are you able to replicate it? If so, how?
Just try out the commands I stated above. Btw you can also verify it by searching for pokemon with "Bulk Up" in your teambuilder in PS. Ursaluna-Bloodmoon will show up.