Speak to Andrew @ -530 96 575 in Finderia Town

Find Andrew's Pidgey in a big tree at spawn @ -485 96 564

Find the mysterious person who took Andrew's Rattata near the Pokémon Center @ -449 96 557

Battle:

• Lv 15 Rattata

Find Andrew's Jigglypuff somewhere high up near the Pokémon Center at spawn @ -448 106 600

Talk to Andrew (-530 96 575)

Once you talk to him, the quest will complete and you will then receive the rewards that are listed.