Iv'e seen this in most servers, maybe you could add shiny starters when you first start the game? And also, maybe there can be an NPC that you could visit once a week that could give you coins/tokens depending on the pokemon you want to give to them, for example, Pidgey: 10 coins Lapras: 5,000 coins or 5 tokens
Shiny pokemon are donor perk bought through eggs. Would be cool to sell junk pokemon for coins / tokens . Btw when you say most other servers this isn't pixelmon btw ...
Shiny starters would be a terrible idea as it would ruin the economy But selling Pokémon with coins/tokens would be an interesting and profitable idea!