Outside of summer, this town has very few people and almost looks deserted; the villas are all empty. However, during summer, the villas in the town are all occupied by vacationers. One of the vacationers states that he came there from the far away region of Hoenn. Undella Town's sea is the people's favorite during this hot season.
A Town of Rippling Waves (Japanese: 押しては返す波の音The sound of the ebbs and flows of the waves.)
Upon visiting Undella Town, the player will see Draco outside the Riches' villa. After accepting his challenge and defeating him in battle, he will show the player inside, then tell the player to come back the next day. If he or she does, and defeats Draco again, Susan will enter the Villa and immediately challenge the player. Doing this the next day will cause Clairdonna to appear, then Zillion, and so on. After defeating Miles, the family will not accept any more challenges.
The Riches' house is demolished by the time of Pokémon Black 2 and White 2 as most of the family has moved away. An entrance to Reversal Mountain can be found in place of the Riches' land. The item maniac can now be found in a small villa next door.
Caitlin owns a villa in Undella Town. Cynthia, the Champion of the Sinnoh region, appears here and remains in the villa until she is battled, after which she will be present during spring and summer, and can be battled once per day in spring. If the player battles Cynthia for the first time during spring, they can have a second battle with her on the same day.
During the spring, Shauntal and/or Caitlin may be found in the villa visiting her. During the summer, Lenora, Iris, Elesa and/or Skyla may be found in the villa. In Black 2 and White 2, Lenora and Iris don't do so because they are no longer Gym Leaders. Skyla and Elesa still visit, in addition to Roxie.
By the time of Pokémon Black 2 and White 2, an underwater tunnel was constructed to commemorate the friendship between Undella Town and Humilau City. The entrance can be found in the middle of the town, being in place of a former villa.
Pokémon Black and White
Undella Town has a population of 12, excluding Cynthia, who stays in Caitlin's villa. It is the second smallest town in the Unovaregion.
Pokémon Black 2 and White 2
Undella Town's population increases by 3 with a population of 15.
Unlike some other towns, where singular instrument tracks are added to the background theme in certain circumstances, Undella Town has two different themes depending on the season. In summer, a lively calypso tune is used; in autumn, winter, and spring, a mellow synth-led arrangement is used.