I once made a Jack O'Lantern fakemon as a request for someone on another board. I can go look for it if anyone's interested.
If only I could do it for you. But my tablet's pen has running out of battery.
That's fine, I found them.
Jackolan (Ghost/Grass) Evolves into Frightlight
"Jackolan is a peculiar Pokemon; they are in fact small spirits resembling candle flames. However, these are rarely seen as the Pokemon constantly hides within a hard orange shell resembling a pumpkin, which it uses as armour. No two Jackolan's pumpkin armour has the same facial carvings."
Jackolan, as it's Pokedex states, resembles a pumpkin with a "scary" (in a cute way) face carved into the front. It has two small green vine stubs at the bottom that it uses to move, while inside the pumpkin is the flame spirit that is the actual Fakemon, which resembles a light purple candle flame.
Frightlight (Ghost/Grass) Evolves from Jackolan Evolves into Pumpking
"Jackolan's become Frightlight's when the spirit within the pumpkin body feeds on too much spiritual energy, and grows too large for their body to contain it. It has been rumoured that on Halloween night, several of these Pokemon gather in pumpkin fields and perform some sort of dance ritual. But all attempts to document this phenomenon have mysteriously failed..."
Frightlight resembles a scarecrow with a pumpkin for a head, and an evil-looking face. They are garbed in a poncho seemingly formed from a singed bedsheet and a pair of worn slacks, and it's limbs appear to be made out of branches. On it's head is a tattered, wide-brimmed black hat.
Pumpking (Ghost/Grass) Evolves from Frightlight
"When the spirits of several Frightlights come together, they can merge to become a Pumpking. Pumpkings are said to be the kings of the spirit world, and when it visits the human realm, it leaves small traces of it's immense spiritual power behind, which possess pumpkins in order to become Jackolans. Thus the cycle begins anew. However, there is no factual evidence to support this theory."
Pumpking looks like an enormous Jack O'Lantern with a wide open mouth, unlike it's predecessors where the spirit was difficult to see when in it's pumpkin. The purple flame now looks closer to a bonfire with a pair of glowing red eyes shining from the flames. Several tentacles made of roots extend from the bottom of the pumpkin, and two large clawed arms made of vines grow from the top.
"The greatest pleasure in life is doing what people say you can't do." ~Walter Bagehot