Jenkins has replaced Tippett as the second tall in the Crows' attack since the latter defected to the Sydney Swans late last year.
A former basketballer, Jenkins has impressed with his marking ability and, at 197cm and 104kg, he has the size to trouble even the bulkiest of defenders.
The 24-year-old took 12 marks and kicked two goals in Adelaide's 19-point win over the Brisbane Lions last Saturday.
Trengove said the Crows' two-tiered attack remained a threat despite Tippett's absence.
"You take out Tippett and then you throw in Jenkins, who's a massive frame - he's a really big man," Trengove said.
"I think he took [12] grabs the other night so…he brings that big body and can take a mark and kick a goal.
"He's slid in there really well and I think he's been super over the pre-season and the last two games.
"It's not going to be any different to what us as a back six have to do, we've got a job on some really good players."
Despite winning the opening two games of the season and entering Showdown XXXIV in second spot on the AFL ladder, Trengove said his side would be "stupid" to consider itself the fancy on Sunday.
The Crows' 2012 season, in which they fell agonisingly short of a Grand Final berth, still meant they should be expected to win.
"We were 14th last year and they were fighting for that Grand Final spot, so it'd be stupid to look at ourselves and say we were going in favourites," he said.
"We're definitely underdogs."
Trengove, a member of the Power's leadership group, said the Showdown's result could be determined by a single, game-defining contest.
"There's always a contest that really sets the scene for the rest of the game or it turns the game in a certain way," he said.
"We've got to be ready for that contest, whether it happens in the first quarter or it's late in the third or fourth, you actually don't know when it's going to pop up.
"When it pops up you've got to win it because it could turn the game."
When such a contest arrived, the defender said there would be no doubt who the Power's number one target would be: superstar Crow Patrick Dangerfield.
Trengove admitted it could be impossible to stop the 23-year-old, who almost single handedly won Adelaide the game in the final term against the Lions last week.
"He's just got that super running ability, he's got that speed and muscle to break open games," he said.
"Everyone saw it against the Brisbane Lions, he went in there and just wanted it more…and was able to turn the game with two goals.
"He's going to be important for us to stop and I don't know whether you can stop him, it's going to be an interesting battle."
Harry Thring is a reporter for AFL Media. Follow him on Twitter: @AFL_Harry.
