Sponty is a original character by LunarSage/TehCait and is drawn as futanari by a wide variety of artists for some reason. So technically this is rule 34.

Related posts:

Metroid Samus Aran Futanari Two Metroid Samus Aran Futanari One Metroid Samus Aran Futanari Three Metroid Samus Aran Futanari Four Futa Samus Aran – 3 – Aroma Sensei Futa Samus Aran – 1 Sponty Futa – Two Futa Samus Aran – 9 Futa Samus Aran – 2 Sponty Futa – Four Metroid Samus Aran Futanari Rule34 – Five Futa Samus Aran – 4