[[File:Allosaurus_Ultrasaurus.png|thumb|left]]''Allosaurus'' appeared once more as a minor alter ego of Calvin's in a Sunday strip. In it, a ''Supersaurus'' (identified as an ultrasaur, in reference to ''[[Ultrasauros]]'') took in a drink at a waterhole; the ''Allosaurus'', also thirsty, tried to confront it for access to the water. However, as it approached its competitor, the Allosaurus realized it had no chance of bringing down the ''Supersaurus''. Allosaurus was here analogous to Calvin waiting in line at a school water fountain to avoid being hit by Moe.
Allosaurus made one more appearance in a Sunday strip as a minor alter ego of Calvin's. In it,