Riceu_Mochi

Do you want me to send you the links to some of the better ones to make your search easier?

25. It's Dark (original)- Fukase, Kagamine Len, Oliver & Utatane Piko (tuned by GHOST). I honestly don't know whether this song was supposed to be a joke but it's still funny anyways …
            26. Trick & Treat (cover)- Kagamine Len & Utatane Piko (tuned by Hyurno [Len] & Ricardo-P/Tsuna [Piko])
            27. Lemon (cover)- Utatane Piko &VY2 (tuned by Roseus 1215)
            28. 1/6 -Out of the Gravity- (cover)- MAIKA & Utatane Piko (tuned by Post Try?)
            29. Daughter of Evil (cover; christened "Prince of Evil")- Utatane Piko (tuned by LuYurippe)
            30. Servant of Evil (cover)- Utatane Piko (tuned by LuYurippe)
            31. Regret Message (cover)- Utatane Piko (tuned by LuYurippe)
            32. 39Music! (cover)- Utatane Piko (tuned by HASU KEI)
            33. MKDR (cover)- Utatane Piko (tuned by HASU KEI)
            34. Sweet Devil (cover)- Utatane Piko (tuned by HASU KEI)
            35. Meteor Words (cover)- Utatane Piko (I have no idea who first tunes it but it is retuned by Susinko)
            36. Happy Days (cover)- Flower, Fukase, Oliver & Utatane Piko (tuned by IKawaiism)
            37. Six Trillion Years and Overnight Story (cover)- Utatane Piko (tuned by Xelios)
            38. Toosenbo (cover)- Utatane Piko (tuned by Kyaami)
            39. Drop Pop Candy (cover)- Fukase & Utatane Piko (tuned by せらん)
            40. The Transient Apple Salesgirl (cover)- Utatane Piko (tuned by LuYurippe)
            ...
            I died making this list.

Hello! I thought I'd give you a complete list of the Piko songs I would recommend to you. (you asked me, remember?) 
            1. Shota Shota Island (original)- Kagamine Len & Utatane Piko (tuned by Gobou-P)
            2. Pomp and Circumstance (cover)- Kagamine Len, KAITO, Kamui Gakupo, Utatane Piko & VY2 (tuned by Dark Angel Alhena)
            3. I'll Quit Singing (cover; christened "I'll Quit Being Shota")- Utatane Piko (tuned by Apple-P)
            4. Love is War (cover)- Utatane Piko (tuned by LuYurippe)
            5. Just Be Friends (cover)- Utatane Piko (tuned by LuYurippe)
            6. Ah, It's A Wonderful Cat Life (cover)- GUMI & Utatane Piko (tuned by Nem [GUMI] & TsugineKakoVocaindo [Piko]
            7. Magnet (cover)- Utatane Piko (tuned by Ningyoplug)
            8. Karakuri Pierrot (cover)- Utatane Piko (tuned by Ricardo P/Tsuna)
            9. Matchless (cover)- Kagamine Len, KAITO, Kamui Gakupo, Utatane Piko & VY2 (tuned by DarkAngelAlhena)
            10. Wave (cover)- Utatane Piko (tuned by Niki)
            11. Checkmate (cover)- Utatane Piko (tuned by LuYurippe)
            12. -Error (cover)- Utatane Piko (tuned by NyancyPeekachew)
            13. Hyperdontia (cover)- Flower & Utatane Piko (tuned by GHOST, Creep-P [Flower] & Kawaiism [Piko])
            14. Undead Enemy- Utatane Piko (tuned by Apple-P/VocaApple)
            15. Turn Me On (Cover)- Kagamine Rin & Utatane Piko (tuned by Apple-P/VocaApple)
            16. Mozaik Role (cover)- Kagamine Len & Utatane Piko (tuned by Hyurno [Len] & Ricardo-P/Tsuna [Piko])
            17. Remember (original)- Utatane Piko (tuned by Kannakuzu)
            18. Melt (cover)- Flower & Utatane Piko (tuned by Kalfina-P)
            19. Piko's Feelings (original)- Utatane Piko (tuned by Gobou-P)
            20. Fire◎Flower (cover)- Utatane Piko (tuned by DarkAngelAlhena)
            21. World Domination How To (cover)- SF-A2 Codename Miki & Utatane Piko (tuned by Nozomi)
            22. Live Proof (cover)- Utatane Piko (tuned by U1000)
            23. I Wanna Go (cover)- Kagamine Len & Utatane Piko (tuned by Kanon746 [Len] & Apple-P/VocaApple [Piko])
            24. Satisfaction (cover)- Utatane Piko (tuned by IKawaiism)