All of these challenges have different gimmicks, so there's bound to be one out there to suit any fan's needs. Often spin-off titles just don't cut it, so over the years, the community has banded together to develop new challenge runs they can try for a difficult experience. Some of these players look to the competitive scene to get their challenge, but others desire a challenging single-player experience. RELATED: Pokemon: Gen 1 Pokemon With Great Designs (That Are Useless In Battle)