Flaaffy (HeartGold & SoulSilver HS 42)

Flaaffy — 80 HP — [L]
Stage 1 — Evolves from Mareep

[L] Thunder Spear
Choose 1 of your opponent’s Pokémon. This attack does 20 damage to that Pokémon. (Don’t apply Weakness and Resistance for Benched Pokémon.)

[L][C][C] Thundershock: 40
Flip a coin. If heads, the Defending Pokémon is now Paralyzed.

weakness: [F]×2
resistance: [M]-20
retreat: 1

Illus. Masakazu Fukuda
HeartGold & SoulSilver — 42/123 — Uncommon

As a result of storing too much electricity, it developed patches where even downy wool won’t grow.