Importing Animation

In order to import animation, you need to import skeleton first (using advanced), then animation. Mesh is optional.

Importing Skeleton

Either go to File > Import > Lost Saga Skeleton (.skl), or through the n-panel, inside SKL/MSH panel, using the Import Skeleton button. After this, choose normal.skl, make sure the mode is set to Advanced (display choice doesn't matter), and then import them.

Importing Animation

In the Animation Entry panel, click the Import button. After animation has been appended to entry, select the entry you want to insert, select armature/bone, and then click the Apply Animation button

Attaching Mesh

In the outliner, there is mesh_armature object, use that object to attach meshes with.