Well, that incarnation was responsible for one of the earliest known puja text in use by Trode Khangsar for a long time, even before the advent of Kyabje Pabongka Rinpoche.
"Serkong Dorje Chang writes that one of the earliest and most significant Dorje Shugden rituals, Petition to Dorje Shugden Tsel: Granting all Desired Activities, is most likely co-composed by the third Dreuley incarnation, Drubwang Tenzin Zangpo and Morchen Kunga Lhundrub. So significant it was that Serkong Dorje Chang would also later incorporate this ritual into his own writings and it was included in the extensive catalogue of Shugden texts and lineages compiled by Lobsang Tamdin." -
http://dorjeshugden.com/wp/?p=13533In this text, Serkong Dorje Chang called Dorje Shugden, Dharma Protector of the Conqueror Manjunatha (Je Tsongkhapa).
Unfortunately, the current incarnation, the 3rd Serkong Dorje Chang has declared on his new blog:-
"UNFORTUNATELY WHEN SOMEONE LOOKS UP MY NAME ON INTERNET, IT IMMEDIATELY APPEARS IN THE DORJE SHUGDEN WEBSITES.
I HAVE NEVER AND WILL NEVER PRAY TO DORJE SHUGDEN!
THIS MUST BE MADE CLEAR FROM THE FIRST PAGE OF MY BLOG!
WHEN I WAS 4 YEARS OLD I WAS RECOGNIZED BY HH THE 14th DALAI LAMA DURING A KALACHAKRA INITIATION IN BODHGAYA AS THE REINCARNATION OF THE 2nd SERKONG DORJEE CHANG.
AT 19 YEARS OLD I ALSO RECEIVED FULL MONASTIC ORDINATION FROM HH THE 14th DALAI LAMA.
HH THE 14th DALAI LAMA GAVE ME MY NAME "TENZIN NGAWANG TSULTRIM DHONDEN".
I FOLLOW EVERYTHING AND ANYTHING THAT HH THE DALAI LAMA TELLS ME."
http://www.serkongdorjeechangrinpoche.com/?view=classic