Hello! This is a topic that has been here for a while, and it was one of my first deltas I have ever made! So I return to make a very needed edit, to make it much nicer, smoother, and even more unique. I hope you enjoy!
Paras and Parasect are Pokemon that are some of the first pokemon with Dark backstories. With this in mind I made deltas based off of them.
The first one is Paras, 
who is a Ghost/Psychic type. It’s abilities originate from the original Paras. The Pokedex entry states, “It was once a normal Paras, but it was then infected with a strange fungus named Ratio Boletus, which makes the victim phase through multiple dimensions at once.” Before we show you Parasect, it’s best to show you the shiny now. Here it is. 
Delta Parasect 
Is like it’s previous evolution, both in it’s type, and it’s abilities. It does however have an unique move named, “Dimension hop” which is a two turn move that works like the move Dig, but when you attack, it does less damage, but gives the enemy a random status effect on impact. Moving on to the Pokedex entry, it says, “The Parasect has gained the ability to harness the ability to jump between multiple dimensions. However, if any creature latches on while it’s traveling to different realities, the creature will be infected with the fungus that infected the Parasect.” Here’s the shiny sprite of the Parasect. 
If you enjoyed the idea of the delta Parasect line, please support by liking, and commenting what you think down below! All support is appreciated, and thank you for giving your time to read this post.