| Type | Power | Accuracy | PP |
| Bug | 100 | 20 | |
| Target | Contact | TM/HM | |
| User only | No | -- | |
The Special Attack stat of the pokemon using Tail Glow will increase by 1 step on the Stat growth scale.
Because of the uniformity of the increases of the value, this increase translates into an increase equivalent to half of the original value of the Special Attack stat each time this move is used. In more definite terms, starting with no modifiers, the 1st use of the move will make the Special Attack stat 150% of the original value, the 2nd will make it 200% of the original value, the 3rd will make it 250% of the original value, etc.
Tail Glow will always fail if it has already been used 6 times by the same pokemon, without a move that lowers Special Attack being used on or against the pokemon using Tail Glow. This is due to the fact that a stat may only be raised by a maximum of 6 steps, until it is reset by the use of Haze or the pokemon is switched out normally. The maximum is the limit of how many increases can be applied to a stat. If another move increases the Special Attack stat of the pokemon using Tail Glow, the number of steps that it increases the Special Attack stat by will count toward the 6 step limit, and reduce the number of times that Tail Glow can be used appropriately.