So, does trample work with Evasion since it's a reflex save?
Evasion (Ex)
At 2nd level or higher, a monk can avoid damage from many area-effect attacks. If a monk makes a successful Reflex saving throw against an attack that normally deals half damage on a successful save, he instead takes no damage. Evasion can be used only if a monk is wearing light armor or no armor. A helpless monk does not gain the benefit of evasion.
Trample (Ex)
As a full-round action, a creature with the trample ability can attempt to overrun any creature that is at least one size category Smaller than itself. This works just like the overrun combat maneuver, but the trampling creature does not need to make a check, it merely has to move over opponents in its path. Targets of a trample take an amount of damage equal to the trampling creature’s slam damage + 1-1/2 times its Str modifier. Targets of a trample can make an attack of opportunity, but at a –4 penalty. If targets forgo an attack of opportunity, they can attempt to avoid the trampling creature and receive a Reflex save to take half damage. The save DC against a creature’s trample attack is 10 + 1/2 the creature’s HD + the creature’s Str modifier (the exact DC is given in the creature’s descriptive text). A trampling creature can only deal trampling damage to each target once per round, no matter how many times its movement takes it over a target creature.
Without a shred of a doubt, yes. Any effect that allows for a Reflex save can be avoided by Evasion, provided no exceptions exist in the effects specifically disallowing it.
Without a shred of a doubt, yes. Any effect that allows for a Reflex save can be avoided by Evasion, provided no exceptions exist in the effects specifically disallowing it.
Technically, you only evade reflex (half) effects, if it's a partial effect that isn't halving damage, you don't ignore the partial effect unless the save says you would.
Trample is one of the more believable attacks to totally ignore with evasion, you nimbly roll away from the creatures way. Dodging fireballs that fill the whole room is harder to imagine.