When your digimon dies pick the green spotted egg.
When you get a Botamon, train it into In-Training and try to get an Agumon. Train it to 100 OFF and 10 or more battles and it should digivolve into a meramon (just incase you didn't know, Meramon is a big fire man). Then train Meramons stats up to 4000 Hit Points, 3000 Magic Points, 500 OFF and Def and 300 Spd(speed) and Brn(brain). After you do that go and fight as many battles as you can. By the age of 11, Meramon should digivolve into Metal Greymon.