You can get medals by beating spheda, time limits or by beating the levels with the weapon asked to be used. After beating 40 of these things you will have 40 medals.

I don't know how to rename a weapon

I don't know how to rename a weapon

First go to the underground channel,go to the first dungeon and press X to one of the
dungeon it will show what to do to get a medal look for the time that you'll have to
defeat all the enemies.Enter the dungeon and then defeat less than that time.If you wanna
have play
speda on that dungeon

First go to the underground channel,go to the first dungeon and press X to one of the
dungeon it will show what to do to get a medal look for the time that you'll have to
defeat all the enemies.Enter the dungeon and then defeat less than that time.If you wanna
have fun play speda on that dungeon.