If you would want to learn more about Pabongkha Rinpoche, do read the book called Chod of the Ganden Tradition by Zong Rinpoche. There he explains that one of Pabongkha's previous incarnations include the Mahasiddha Krishnapada who "missed" his chance to go to the pure lands when the Yidams manifested as actual people to try to invite him to there. Normally it would be the dakinis or the dharma protectors, but in Krishnapada's case, it was the actual Yidams.
Yamantaka appeared as a dark colored man outside of the retreat cave of Krishnapada and kept trying to convince him to come out and if he did, he would have been taken to the pure land. Vajrayogini came and invited him in the form of a leper lady who asked for his help to cross the river, but his disciple helped her instead and was carried by Vajrayogini to Kechara. So in that way, Krishnapada "did not manage to go to the pure lands".
To some people, this might seem to be that Krishnapada made the mistake of not going to the pure lands and attain enlightenment, but this is not true. It takes a lot and a lot of compassion and strength to resist the peace and quiet of the pure lands in exchange for the nightmare that is samsara, teaching students, training them, having to face all sorts of problems with them and giving teachings to people who are resistant…
In reality, Krishnapada avoided the pure lands and yidams on purpose because his compassion for beings in samsara was strong enough to resist the peace and ease of the pure lands. The fact that the actual Yidams themselves came to invite Krishnapada shows you what kind of being he is. And he is Pabongkha Rinpoche today.