Yeah, reverb is done using a plugin or outside hardware, not part of the samples themselves - sometimes VST instruments come with a reverb built-in. The DKC soundtrack in particular actually didn't use the SNES's reverb, instead Dave Wise used delay (a doubling of one of the instrument channels played slightly ahead) for that effect.
To pitch bend, you can use slide notes in the piano roll if you're using an FL native plugin (ex. Fruity Soundfont Player), or otherwise through automation clips.
I whipped up an FLP of a portion of the guitar lead in Gangplank Galleon as I was curious myself - it has the slide notes, delay, and volume automation. http://www.mediafire.com/file/j3920jsal06lsni/gangplank+galleon.flp