if you donate 20,000 gotchi points, then 60,000 gotchi points, then 200,000 gotchi points, then you get an "extraordinary prize" and I think you get different cool things each donation. Note: you have to give these donation amounts in order, also you have to visit the king Tamagotchi Town, even though it doesn't tell you to, sorry but I think you wasted the 5,000 gotchi points, I'm no expert but I'm pretty sure you have to donate the whole 20,000 at one time, if you want to, you could try to donate another 15,000 gotchi points to add up to the 20,000 but I don't know if that'll do it or not.