The Arbor Area includes the Mill Path and the Verdant Garden, where Serperior holds court. It has 43 Pokémon. Here is how to befriend them, based on the Poképédia list.
| No. | Pokémon | How to befriend | Location |
|---|---|---|---|
| 045 | Karrablast | Talk to it | Mill Path |
| 046 | Cottonee | Beat it in a race | Mill Path |
| 047 | Whimsicott | Beat it in a race | Mill Path |
| 048 | Caterpie | Beat it in a duel | Mill Path |
| 049 | Scyther | Beat it in a duel — available after befriending Mankey | Mill Path |
| 050 | Sudowoodo | Water it, then find it in hide-and-seek | Mill Path |
| 051 | Zorua | Find it in hide-and-seek after befriending Zoroark | Mill Path |
| 052 | Zoroark | Beat it in a duel in the Wish Park (story) | Mill Path |
| 053 | Pawniard | Beat Bisharp and them in battle once Chandelure is defeated | Mill Path |
| 054 | Bisharp | Beat the Pawniard and it in battle once Chandelure is defeated | Mill Path |
| 055 | Buneary | Find it in hide-and-seek — available after rescuing it from the Wish Park | Mill Path |
| 056 | Leafeon | Complete its course — available after rescuing it from the Wish Park | Mill Path |
| 057 | Foongus | Attack it, then beat it in a race | Mill Path |
| 058 | Amoonguss | Beat it in a duel — available after befriending Foongus | Mill Path |
| 059 | Tympole | Show it a photo of Seismitoad | Mill Path |
| 060 | Seismitoad | Beat it in a duel | Verdant Garden |
| 061 | Magikarp | Carry it to the river | Mill Path |
| 062 | Oddish | Water it, then answer its quiz correctly | Mill Path |
| 063 | Mankey | Beat it in a duel | Mill Path |
| 064 | Kakuna | Beat all 4 Kakuna at once — available after befriending Magikarp | Mill Path |
| 065 | Snorlax | Talk to it — available after befriending Cottonee | Mill Path |
| 066 | Sewaddle | Beat it in a race — available after befriending Oddish | Mill Path |
| 067 | Leavanny | Beat it in a duel | Verdant Garden |
| 068 | Lilligant | Beat it in a duel | Verdant Garden |
| 069 | Serperior | Beat it in a duel after finishing the game | Verdant Garden |
| 070 | Deerling | Beat it in a race | Verdant Garden |
| 071 | Vaporeon | Complete its course | Verdant Garden |
| 072 | Psyduck | Show it a photo of Emolga — available after rescuing it from the Wish Park | Verdant Garden |
| 073 | Shroomish | Answer its quiz correctly — available after rescuing it from the Wish Park | Verdant Garden |
| 074 | Venipede | Beat it in a duel | Verdant Garden |
| 075 | Whirlipede | Beat it in a race — available after befriending Venipede | Verdant Garden |
| 076 | Scolipede | Beat it in a duel — available after finishing the game | Verdant Garden |
| 077 | Skiploom | Give it 3 Dew Drops | Verdant Garden |
| 078 | Surskit | Beat it in a race | Verdant Garden |
| 079 | Basculin | Beat it in a race | Red ones (and one blue): Verdant Garden; Blue ones (and one red): Lakeshore |
| 080 | Dugtrio | Talk to it | Verdant Garden |
| 081 | Ducklett | Beat it in a race after jumping into Dugtrio’s hole | Verdant Garden |
| 082 | Stunfisk | Find it in hide-and-seek — available after befriending Ducklett | Verdant Garden |
| 083 | Excadrill | Beat it in a duel | Verdant Garden |
| 084 | Woobat | Beat it in a race — available after opening the cave with Tepig | Verdant Garden |
| 085 | Ferrothorn | Beat it in a duel — available after opening the cave with Tepig | Verdant Garden |
| 086 | Bronzong | Water it — available after opening the cave with Tepig | Verdant Garden |
| 087 | Burmy | Talk to it — available after finishing the game | Verdant Garden |
