It depends on how many ship parts you got.
If you get all 25 necessary parts but not all 30, you get the "good" ending, wherein you just barely escape.
If you manage to collect all 30 parts, you are treated to the "happy" ending, wherein Olimar sees many colors of Onion.
If none of your Pikmin die in the Pikmin games and you beat it nothing happens other than beating the game.
throw pikmin
In Pikmin 2, you just get "The Key". In Pikmin 1 and I believe Pikmin 3, you have to beat the game.
The fastest time anyone has ever beaten Pikmin is nine in-game days.
There is not information on what occurs when players sprout 999 Pikmin of any color within the Pikmin games.
If you mean the Emperor Bulblax, he can be a toughie. I once saw a guy on YouTube beat him with not a single Pikmin death! In fact, he beat the whole game in 9 days with out 1 Pikmin dying! Anyway, use mostly Red Pikmin, the more with flowers the better. Also use Bomb-rocks. I lost 198 Pikmin on this fight, hopefully you can do better!
Winged Pikmin can drown when they fall into a body of water, but it rarely happens as they are normally in flight.
If you collected enough ship parts, you blast off into the atmosphere. If not, you die and turn into a Pikmin.
They leave them outside.
This so far, can only happen in pikmin 1 and it means game ove
Because the most fearsome creatures on the planet come out to hunt during the night, Olimar and the Pikmin have to go into low orbit above the planet after the sun sets. Any Pikmin not in the Onions will be eaten by predators.
No there is not a Pikmin that will give you more or additional Pikmin.