Since thrissur is not very far from kochi, where I live, we used to go to Lulu mall at least once in a month before the covid 19 situation. It is in the heart of the town. It has an entry directly from the Kochi metro station. This is the biggest mall in Kochi. The mall is beautifully built and well maintained. It is very clean and well organized. Enough parking facilities are there.
You will have a great shopping experience here. As usual, many national and international brand show rooms and shops are here. Lulu hyper market is the world class hyper market with all quality things .A large food court and childrens play enclosure which are perfectly managed and maintained.
There is a class in everything about this mall.
So, this is a must visit mall during your trip to Kochi. Visit there even if you dont want to buy anything, Just go there, chill out and enjoy.!