If you can export them to HTML (I think that's an option in Evo -- not sure), you can use the Import HTML option in Revolution. IIRC, it will use the filename as the pagetitle and alias and put whatever is in the body in the content field.
http://www.webhostinghub.com/support/edu/modx/beginning-modx/how-import-html-modx
In Revo, you can drag them around in the tree to create your structure.
If you just want a bunch of blank documents, this snippet should do it:
<?php
$total = 200; /* or however many you need */
$template = 12; /* ID of the template you want for them */
$parent = 3; /* ID of a folder to put them all in (use 0 to put them in the root directory) */
/* Important: Be sure to create the folder before running the snippet */
for ($i = 1; $i <= $total; $i++) {
$fields = array( /* adjust these to what you want */
'pagetitle' => 'Resource' . $i;
'alias' => 'resource' . $i;
'published' => true,
'hidemenu' => false,
'richtext' => false,
'template' => $template,
'parent' => $parent;
'searchable' => true,
'cacheable' => true,
);
$doc = $modx->newObject('modDocument', $fields);
$doc->save();
}
FYI, if you do end up creating them manually, check out the three little icons at the upper right of the Create/Edit Resource panel. If you click on the left one, every time you save a resource, you'll go to a blank form to create another. Click on one of the other two when you're done.