Suggestion: Put Masterball to sell in Celadon Mart, Game Corner, or other place, for a high price.
Pros:
- Money Sink;
- Give the players more chances to capture shiny pokémons with detrimental moves (Selfdestruct, Explosion, Roar, Whirwind);
Cons:
- Convenience;
- Decrease the value of shiny pokémons with detrimental moves (Selfdestruct, Explosion, Roar, Whirwind). (not sure about this one, tho; I am not a shiny trader)
Before someone says it is completely different from the