https://pokecharms.com/trainer-card-maker/But with a bit of spice added...
If you’ve been playing pokemon for at least 6 years, you may have a mega on your team.
If you’ve been playing pokemon for at least 15 years, you may have a mythical and a mega on your team.
If you’ve been playing since RBY first came out, you may have a legendary, mythical, and mega on your team.
You don’t have to add any of them if you don’t want to.