情熱開花！サマーフェスティバル Jōnetsu kaika! Samā Fesutibaru) is part one of episode 18 of GO-GO Tamagotchi!. Along with part two, it is episode 239 overall. It first aired on August 7, 2014.
The long-awaited DoriTama Town Summer Festival sponsored by the Gotchi King will be held. Melodytchi helps at Oyajitchi's stall, the Spacy Brothers sell watermelons, and everyone is excited for the special fireworks finale.
- Gotchi King
- Princess Tamako