You’ll find TM74 Gyro Ball at the Game Corner Prize Exchange building in Veilstone City. Each copy of the TM costs 15,000 Coins, and this is the only way to acquire the TM in Platinum.
You can get Coins by either winning them or buying them at the Veilstone Game Corner.
And as for the move itself:
Gyro Ball is a damage-dealing Steel-type physical move. Its base power depends on how much lower the user’s Speed stat is than the target’s.
TM74 Gyro Ball Location
TM74 Gyro Ball is found in the Veilstone City Prize Exchange building, next door to the Game Corner, on a raised strip to the south of the Pokémon Center.
From the Veilstone Pokémon Center, head south on the main paved street.
Climb the next staircase you see, and the blue-roofed Prize Exchange building will be right in front of you.
Speak to the clerk in the booth and find the listing for TM74 Gyro Ball.
Each copy of TM74 Gyro Ball costs 15,000 Coins.
These coins can be obtained at the Game Corner next door, either by winning them from the slot machines, or by buying them from the clerk there using PokéDollars.
The PokéDollar-to-Coin exchange rate is 1000 dollars for 50 coins (or 10,000 for 500). So to buy enough Coins for TM74, it would cost 300,000 PokéDollars.
Gyro Ball Details and Uses
Gyro Ball is a damage-dealing Steel-type physical move. The amount of damage it inflicts depends on how much slower the user is than the target.
|Gyro Ball Move Details|
|PP||5 (max. 8)|
Gyro Ball is only truly useful when used by a Pokémon with a low Speed stat. Its base power can be any value from 1 (if the user is much faster than the target) to 150 (if the user’s Speed stat is at least 5.96 times lower than target’s).
Roughly, the formula used to calculate the damage is as follows:
This calculation factors in items, Abilities, and moves that slow a Pokémon down – but not those that affect a Pokémon’s priority in a turn.
- A Pokémon holding an Iron Ball (which halves the holder’s Speed stat) will see increased damage from Gyro Ball.
- Whereas Gyro Ball’s damage output will not see a boost from the move Trick Room, which only reverses move order.
One effective strategy would be to teach both Gyro Ball and Curse to a slower Steel-type Pokémon, like Steelix.
Steelix’s base Speed stat is extremely low (30). But the move Curse will decrease its Speed even further, while simultaneously boosting its already decent (base 80) Attack stat.
And since a Steelix using Gyro Ball would also benefit from STAB (Same-Type Attack Bonus) damage, this could amount to several hits with a 200 base power attack. This assumes the opponent isn’t able to take advantage of Steelix’s slowness and take down Steelix early in the battle.
Miscellaneous information about Gyro Ball:
- A copy of TM74 Gyro Ball can be resold for 1500 PokéDollars. Although this isn’t recommended due to the TM’s initial costliness.
- If Gyro Ball is used in a Pokémon Contest, it will earn the user 2 Appeal Points and double its score on the final turn.