I could see a creative liberty where instead of blowing up, a fully charged Gumball Popgun does the sticky trap. Maybe with a visual of the Popgun somehow overheating to explain why it's suddenly a sticky trap; the heat melted the gumballs a bit and made them soft. Ignore that in real life, this would clog the gun.
Is it mandatory? No. But that's the only way I can see her have a sticky trap move. Much like how the Peanut Popgun never blows up in the actual DK games.
Otherwise, Gumball Popgun is 100% a family-friendly shotgun which, assuming a grappler focus since she could reasonably have DK's carry mechanic, would still encourage getting up close and personal to maximize damage.