I came back to playing Pokémon Diamond again tonight, but this time I decided to earn some ribbons for some of my Pokémon such as the Effort Ribbon (given to a Pokémon if it has the maximum of 510 total effort values) and the Footprint Ribbon (given to a Pokémon with maximum friendship):
Hooray! Now I have dozens of Pokémon who have earned an Effort Ribbon and/or Footprint Ribbon, and now I’m off to continue doing whatever in this game. 😛