First off; Yes, I do realize It was clearly meant as a parody of the first film and not as an actual serious midquel. At the most it was to give a backstory for Timon and Pumbaa's friendship. And yes, I know that some jungle scenes between Timon, Pumbaa and Simba were written oleh the first film's creators but since we don't know which ones, I wouldn't regard them at all as canon.
And I'm 99% certain that they weren't any of those parenting scenes because they completely and utterly contradict their motto "Hakuna Matata" and from the first film it appears their relationship were bachelor friends,...