Budew

Diamond +2: Over the winter, it closes its bud and endures the cold. In spring, the bud opens and releases pollen.

Pearl: It lives alongside clear ponds. It scatters pollen that induces harsh sneezing and runny noses.

Platinum +2: Sensitive to changing temperature, the bud is said to bloom when it feels the sun’s warm touch.

HeartGold +3: When it feels the sun’s warm touch, it opens its bud to release pollen. It lives alongside clear pools.

Black 2 / White 2: Sensitive to changing temperatures, the bud blooms when it’s warm, releasing toxic pollen.

Sword: The pollen it releases contains poison. If this Pokémon is raised on clean water, the poison’s toxicity is increased.

Shield: This Pokémon is highly sensitive to temperature changes. When its bud starts to open, that means spring is right around the corner.

Legends: Arceus: When the sun's light strengthens, the bud atop this Pokémon's head opens. This is a sign to the people that the harsh winter is over, and the season of budding has begun.