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Forewarn
Description
Alerts the wielder to the opponent's move that has the highest Base Power when the user switches in. If two moves are of the same Base Power, Forewarn randomly selects one. In doubles, Forewarn will only reveal one move total, not one move from each opponent. It selects the highest power move from the two opponents. Forewarn will immediately activate whenever the ability is acquired, such as through Skill Swap or Role Play. All moves without a Base Power are assigned a power, according to the list below.
| Assigned Base Power | Moves |
| 160 |
Fissure, Guillotine, Horn Drill, and Sheer Cold |
| 150 |
Eruption, Water Spout |
| 120 |
Counter, Metal Burst, and Mirror Coat |
| 80 |
Crush Grip, Dragon Rage, Endeavor, Flail, Frustration, Grass Knot, Gyro Ball, Hidden Power, Low Kick, Natural Gift, Night Shade, Psywave, Return, Reversal, Seismic Toss, SonicBoom, Trump Card, and Wring Out |
| 1 |
Everything without a fixed Base Power not listed above. |
