Re: Pocket Girl Hunter
Scenes 1-3, 7, 8, 11, 19 are exclusively for the Light starter, エローナ.
As for Number 6, anytime after clearing the game, visit the 1000$ suite in a love hotel with your アモーレ. Choosing Yes two times will get you the scene, but save before, because it ends the game. This requires having seen No.5 before, by the way.
No. 10 requires a complete Gyarudex, including shiny variants.
No. 24 triggers after whoring out, making a video of OR sleeping with a Black Devil. Each scene is slightly different. To acquire a Black Devil, whore an Angel out and then let her evolve. The Angel needs to either have above five times sex in general, or just whoring her out five times, not sure about that.
No. 26 is a 3p with Fuujin and Raijin. Fuujin can be found after a game clear on the beach behind your house, Raijin in the tunnel between the haunted house and the fourth city. Just sleep with any of them while the other is in the team.
No. 27 goes with メスブータ, the evolution of マゾ. You can find a Maso in the patches after the night city. After you acquired one, go into the BDSM suite while also having either a vibrator, vibe or Queen in your team, there's a scene for each one of them. The Queen is the evolution of the Do-S, found in the same area as the Maso. The ローター can be found by fishing with the best fishing rod, バイブン is its evolution.
No. 28 can be triggered by sleeping with a Yuki-Onna in the cheap room or in the hut on Minato island. Yuki-Onna can be caught in front of the snow city or evolved from ユキオン, found in the haunted house. There's another scene after sleeping with her five times.
No. 30 requires Chronos/クロノス. There's a scene for the first, fifth and tenth time of sleeping with her, as well as one scene for whoring her out and making a video.
Hope that helps.