You can find TM Thief in Mahogany Town in the Rocket Hideout
Chat with our AI personalities
Brave Bird has never been a TM.
Only certain Pokemon can learn it but you can't find the TM
Tackle is not a TM.
You are not able to buy the TM for the move Thief in Pokemon Platinum. You can find the TM for Thief in Eterna City. The move Thief isn't use often competitively and it doesn't matter which Pokemon can use it for it to steal held items.
there is no TM for ancient power.