Is damage calculation applied normally when Shuttleroid is attacked in Yu-Gi-Oh?

Answer 1

Shuttleroid's effect causes what is known as a "replay." This happens whenever an attack is declared, but a potential attack target appears or disappears before the Damage Step. If you declare an attack and the attack target leaves the field, a replay is caused. If you declare an attack and the opponent uses Call of the Haunted, a replay is caused.

When a replay happens, the attacking monster can either continue its attack (choosing a new attack target if they wish) or forfeit their attack for the turn (they could not let another monster attack instead, then attack with the monster that had the replay) and perhaps attack with another monster that hasn't attacked yet.

In the case of Shuttleroid, it will be banished in response to the attack declaration, and a replay will occur. The attacking monster can choose to continue with the attack, choosing a new attack target, which may even be the player if Shuttleroid was his only monster. This attack is a totally regular one following all the usual rules. Or if the only monsters left are stronger ones, it can choose to forfeit its attack that turn.