Transformers found new life in the 1990s, but the series also produced one of the strangest crossovers in Hasbro's history with a surprising connection to a children's book series. By now, some of the greatest gimmicks to come out of Transformers have been crossovers with other franchises. Optimus Prime never needed to face the Terminator or venture into the Star Trek universe, but the world is no less better for these bizarre bouts of creativity. Yet, following Animorphs' entry into the series, Transformers engaged in a perplexing collaboration that left fans bewildered, prompting them to question the origins of this partnership, its influence on the series, and even whether it occurred at all.
Source：https://www.cbr.com/transformers-animorphs-crossover/
