I make them all the time.Not constantly but now and then yes!
If you don't know what it is then read this
Definition of Splice: to join together or unite
(two ropes or parts of a rope) by the interweaving
of strands. in other words to join or unite.
and in this case we join pokemon
Splice is two pokemon sprite
Combined into one
pokemonelite2000.com is the where I get my Splice's
See this Little guy here is a Mew/Celebi and
(Im sure you can guess) a little cyndaquill/Rattata
If any one Is interested I have a tutorial I can show you
For example, I am a Spriter for the site in my sig, Element Destiny. I have a character named Arsenic. He is a Skarmory/Farfetch'd/Umbreon/Houndoom/Sneasal/Sevipr/Dragonair/Gible/Aron/Tyranitar. Part of the reason he has so many species is because in ED, we make sure that the species are compatible with at least the Egg Group of 1 other species of Pokémon. Also, I used many things to make him. He has the body of an Umbreon, ears and orb of a Dragonair, spikes of a Tyranitar, blade of a Sevipr (if slightly different), steel of Aron and Skarmory, bracelets of a Houndour (they never changed when he evolved) and some latent Sneasal and Gible, with Farfetch'd thrown in to allow the bird, Skarmory.