He is the Eastern black rhinoceros (Diceros bicornis michaeli) that recently has been moved from the Resort to the Safaripark.
That is why they want to get a second bull. Maybe when Calimero gets competition from another bull, he will take more interest in the cows again.
From early onset of development cow and bull elephants have differing trajectories whereby males are more challenging/dominating behaviours and females more socially emphatically inclined behaviours come to the fore. In the very same way that around 10-15 years of age the bulls become less attached to their maternal herd and associate with conspecifics in age as well as looking to copy older bulls and experience their presence and behaviours towards same sex as well as in breeding / mating adult cows vis a vis females staying in their maternal herds and developing their socially competent and nurturing sides more fully with experienced mothers who have calved multiple times. As such, bulls and cows that have not experienced those behaviours when younger or have developed in social isolation will never be that competent in adult life.
From a Czech zoo is rather euphemism for Zoo Dvur Kralove, the only zoo in the region to maintain a breeding herd of major importance (and hugely successful at that). Popularly she is known as Emilka (Mweru x Etosha, born October 2017).