Agumon’s Digivolution path has some randomness to it, so it seems like yours rolled into Tyrannomon.
But don’t worry too much about missing Greymon early on. As you continue progressing, you’ll eventually reach an area where Greymon can be encountered naturally, so you can catch one there.
Tell me what the percentage or probability is that Agumon will Digivolve into Greymon. I caught another Agumon to train it, but this one ended up Digivolving into Tyrannomon anyway. I tried restarting the game to get Greymon, but nothing, it keeps Digivolving into Tyrannomon.
