You can buy TM78 Bulldoze from the Technical Machine Shop in Konikoni City. This shop sells another four TMs: TM09, TM40, TM47 and TM51.
Konikoni City is located on Akala Island, and becomes accessible once you complete the Lush Jungle trial.
Obtaining TM78 Bulldoze (Step-by-Step)
During the main storyline you will arrive at Konikoni City from the south.
Step 1: From Konikoni’s entrance, walk north along the main street.
Step 2: Continue heading north along the main street, then walk to the second stall on the left side. Look for a sign with a CD icon hanging in front of the stall.
Step 3: Talk to the vendor and select “Buy” from the menu.
Step 4: Scroll down the menu and select Bulldoze, the fifth item from top to bottom. You can get the TM for 10,000 PokéDollars.
TM78 Bulldoze Details + Use
|Bulldoze Move Details
Bulldoze is a damage-dealing move. When used in battle, Bulldoze will also lower the target’s Speed by one stage.
When used in a doubles battle, Bulldoze will hit the other three Pokémon. In other words: it will hit both opponents, but also the partner Pokémon.
Tip: Pairing a Bulldoze user with a Pokémon immune to Ground-type moves is a very effective strategy.
Bulldoze isn’t useful in competitive play, as it’s outclassed by Earthquake.
In a main story playthrough, however, Bulldoze is one of the best moves available in the early game.
Bulldoze makes up for a lack of reliable Ground-type moves early in the game. The move will remain a solid option until TM26 Earthquake becomes available in the late game.