Regigigas (Legendary)

Minimum must have 1 (opendex)
Regigigas => is Pokemon dex #489 (Legendary)

Opendex
=> Pokemon you already have/registered in your Pokedex, displayed as an image and Pokemon details

Non-Opendex
=> Pokemon you don’t have/not registered in your Pokedex, displayed as a black shadow (means you've seen it in raids/gyms) or just the Pokedex number

Requirements for Opendex Trade:
1. Must have 100 Stardust
2. Must have the Pokemon registered in your Pokedex

Requirements for Non-Opendex Trade:
1. Must have 20,000 (20K) Stardust
2. The Pokemon is still a shadow or not yet owned

Note => Tip for Non-Opendex (Legendary/Shiny Pokemon): Be willing to level up to Ultra Friends to reduce Stardust cost (80,000 Stardust). If you agree, buy the cheapest or your favorite opendex Pokemon from Wantau Store, then message the seller to initiate a 30-day friendship (Ultra Friend).

How to Trade Opendex or Non-Opendex? Check the link below: