My left hand.
These were so much fun to do! And it worked out perfectly because I had an even number of nails left (2) after doing all the actual Pokemon.
Thumb to pinky: Espeon, Glaceon, Flareon, Leafeon, and a normal Pokeball.
Eeveelutions Part 2: [link]
More Pokemon nails: [link] [link] [link] [link]
Hope you like them!