I can't see how Blackstar was evil, just a poor leader. Now, Mapelshade... She wasn't exactly evil. She only wanted revenge. Spoilers:
She was driven out of thunderclan with her three kits after mating with a riverclan Tom, if I'm correct. She was trying to cross the river with her kits to get to her mate, but dropped all three kits into the river and was unable See More to save them. Her mate was enraged with her, and drove her away too. If I'm correct, later she jumps off a cliff and drowns herself. She goes to the dark forest for some reason, possibly for the so called 'murder' of three kits. She then trains Crookedstar after tricking him into thinking she was a starclan cat. Mapelshade claims she only wanted revenge, before disappearing completely and doesn't appear later in the book. In The Last Hope I believe, she does attempt to kill Sandstorm, but Spottedleaf saves her. Mapleshade kills Spottedleaf and runs off.
):< she mean she tricked crookedkit inro thinking she was in starclan,but the only saving grace she has is that she has a reason to be evil but she cant ruin a cats life just cuz hers was bad!
MAPLESHADE I HATE HER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! X-(X-(>:)
Mapleshade, frickin DUH statement. Blackstar hasn't done anything evil yet, I'm on Long Shadows. Sure, no Starclan for him, but he's no Dark Forest cat.
Spoilers:
She was driven out of thunderclan with her three kits after mating with a riverclan Tom, if I'm correct. She was trying to cross the river with her kits to get to her mate, but dropped all three kits into the river and was unable See More to save them. Her mate was enraged with her, and drove her away too.
If I'm correct, later she jumps off a cliff and drowns herself.
She goes to the dark forest for some reason, possibly for the so called 'murder' of three kits. She then trains Crookedstar after tricking him into thinking she was a starclan cat. Mapelshade claims she only wanted revenge, before disappearing completely and doesn't appear later in the book.
In The Last Hope I believe, she does attempt to kill Sandstorm, but Spottedleaf saves her. Mapleshade kills Spottedleaf and runs off.
So technically, neither are evil.