Moving Through Occupied Squares

Unless you are charging, you can move through a square occupied by an ally or a friendly character. When you do so, that creature doesn’t provide you with cover (see page 253).

You can’t normally move through a square that is occupied by an opponent, but you can move through a square that is occupied by a helpless opponent without penalty. Some creatures, particularly very large ones, present an obstacle even when helpless; in such cases, each such square you move through counts as 2 squares. It is also possible to use the tumble task of the Acrobatics skill to move through a square occupied by an opponent (see page 136). Some creatures break these rules. A creature that completely fills the squares it occupies (such as a 5-foot-cube robot) cannot be moved past, even with the Acrobatics skill or similar abilities.

You can’t end your movement in the same square as another creature unless that creature is helpless.