The request is to take a 4 Star of Tentacruel by making a Male Tentacruel dance.
Tentacruel 4 Star Pose: How to Clear Undersea Ballroom Dancing Request
- Visit Lental Seafloor (undersea) at research level 2.
- Take the alternate route that leads to the underground ruins.
- While descending down, hit the MALE Tentacruel with orb and play the melody. Male Tentacruel will start moving towards the ancient ruins.
- In ancient ruins, you will find the Male Tentrcruel with Frillish (near crystalbloom).
- Play the melody to make the Male tentacruel dance & Snap a 4-star picture to complete the request.